# Free energy principle and active inference

## Mathematical Foundations of the Free Energy Principle

The Free Energy Principle constitutes a mathematical formalization of the thermodynamic and information-theoretic imperatives that govern self-organizing systems. Rooted in statistical physics, the principle posits that any bounded, adaptive system that resists the natural tendency toward thermodynamic disorder must behave as if it is performing approximate Bayesian inference [cite: 1, 2, 3]. The core tenet is that living systems act to minimize their variational free energy, an information-theoretic quantity that bounds the "surprise" (or negative log-likelihood) of the sensory inputs they encounter [cite: 4, 5].

In information theory, surprise (surprisal) quantifies the improbability of an event. For a biological organism, highly surprising states are those that fall outside the physiological bounds required for survival. Because a system cannot directly evaluate the Shannon entropy of its environment or precisely compute the true marginal likelihood of its sensory data, it instead evaluates and minimizes an upper bound on this surprise—namely, variational free energy [cite: 2, 3]. By continuously minimizing this free energy, the organism aligns its internal models with the external reality, effectively maximizing the evidence for its own existence [cite: 6, 7].

The principle operates as a normative framework rather than a specific mechanistic hypothesis. In the same way that the principle of least action governs classical mechanics, the Free Energy Principle dictates that all quantities capable of change within a living system—from synaptic weights to macroscopic behaviors—will evolve to minimize free energy [cite: 1, 2]. This framework synthesizes cybernetics, autopoiesis, and predictive coding, proposing that the fundamental drive of life is to render the world predictable.

### Mathematical Components of the Framework

To operationalize the minimization of surprise, the framework relies on specific mathematical constructs that map to the physical architecture of the organism. The organism is theorized to embody a generative model that specifies the joint probability of sensory observations and their hidden environmental causes. Simultaneously, the system maintains a recognition density, representing its internal beliefs about the state of the world [cite: 6, 8]. 

Variational free energy is mathematically defined as the Kullback-Leibler divergence between the recognition density and the true posterior distribution, minus the log evidence of the observations [cite: 3, 6, 8]. Because the Kullback-Leibler divergence cannot be less than zero, free energy strictly upper-bounds the surprise. 

| Mathematical Construct | Definition | Biological Interpretation |
| :--- | :--- | :--- |
| **Surprise (Surprisal)** | The negative log-likelihood of a specific sensory outcome. | The discrepancy between an organism's expected physiological state and its actual sensory input. |
| **Generative Model** | The joint probability distribution over sensory observations and hidden causes. | The organism's inherited and learned neural architecture (or phenotype) that predicts environmental dynamics. |
| **Recognition Density** | The approximate conditional probability of hidden causes given current observations. | The current internal state of the organism (e.g., instantaneous neuronal firing rates). |
| **Variational Free Energy** | An upper bound on surprise, calculated as a function of the recognition density and sensory data. | The quantity that the organism physically minimizes through perception and action to ensure survival. |

## Structural Properties of Markov Blankets

The translation of the Free Energy Principle from an abstract physical law to a functional model of biological systems relies on the concept of the Markov blanket. In probabilistic graphical models, a Markov blanket is the minimal set of variables that renders a target variable conditionally independent from the rest of the network [cite: 9, 10, 11]. Within this framework, the Markov blanket provides the formal mathematical boundary that distinguishes an autonomous system from its environment [cite: 12, 13, 14, 15].

A system defined by a Markov blanket is partitioned into distinct sets of states. Internal states comprise the structural and dynamic configurations intrinsic to the organism, which encode the system's recognition density. External states are the hidden environmental causes that generate sensory data. Separating these two domains are the blanket states, which are subdivided into sensory states and active states [cite: 12, 15]. 

Crucially, the Markov blanket dictates a topology of conditional independence: internal states do not directly interact with external states [cite: 7, 12, 15]. An organism registers the environment vicariously through the perturbations on its sensory states, and it alters the environment exclusively through its active states [cite: 16].

| State Category | Variable | Functional Role | Causal Directionality |
| :--- | :--- | :--- | :--- |
| **Internal States** | $\mu$ | Encodes the organism's beliefs and recognition density. | Influenced by sensory states; influences active states. |
| **External States** | $\eta$ | The hidden environmental causes in the external world. | Influences sensory states; influenced by active states. |
| **Sensory States** | $s$ | Mediates the impact of the environment on the organism. | Influenced by external states; influences internal states. |
| **Active States** | $a$ | Mediates the impact of the organism on the environment. | Influenced by internal states; influences external states. |

### Pearl Blankets Versus Friston Blankets

The application of Markov blankets in cognitive science has generated significant academic discourse regarding their exact definition. A standard statistical blanket, often termed a Pearl blanket, defines a purely statistical separation derived from the topology of a Bayesian network. These blankets provide conditional independence guarantees but do not require any physical or causal interpretation [cite: 11, 15]. 

In contrast, the formulations utilized in the Free Energy Principle, often termed Friston blankets, are defined dynamically. They arise from the particular partition of a stochastic dynamical system operating at a non-equilibrium steady state [cite: 11, 15]. In a Friston blanket, the zero entries in the system's Jacobian matrix define a sparse coupling that actively resists thermodynamic decay [cite: 13, 15]. This physical interpretation allows the internal states of a biological organism to be viewed as performing literal, physical inference regarding the external states, effectively bridging statistical independence with sensorimotor boundaries [cite: 7, 11].

## Active Inference as a Process Theory

While the Free Energy Principle establishes the normative mandate for adaptive systems, Active Inference serves as its corollary process theory. It specifies the actual mechanisms—specifically the perception-action loop—through which an organism minimizes free energy [cite: 1, 17, 18]. Under Active Inference, perception and action are not distinct, sequestered operations; rather, they are complementary pathways to minimize the exact same objective function [cite: 4, 19].

Perceptual inference allows the agent to minimize free energy by updating its internal states to better explain the sensory data it is currently receiving. This is mathematically equivalent to predictive coding, a widely supported neurological theory wherein bottom-up sensory signals are met with top-down predictions. In this architecture, only the unpredicted discrepancies—the prediction errors—propagate upward through the cortical hierarchy to adjust the generative model [cite: 4, 19, 20]. 

Conversely, active inference allows the agent to deploy active states to change the environment, strategically sampling sensory inputs that confirm its prior expectations. Instead of simply updating its internal model to fit the world, the agent moves its body to change the world so that the sensory feedback matches its expectations [cite: 5, 19, 21]. A classical motor reflex arc represents the most fundamental level of this process, where motor control emerges from the suppression of proprioceptive prediction errors [cite: 4, 21].

### Expected Free Energy and Decision Mechanics

In systems capable of complex behavior, decision-making extends beyond reacting to current sensory errors; it requires planning for the future. Active Inference formulates planning through the minimization of Expected Free Energy [cite: 2, 8, 22]. When an agent evaluates potential sequences of actions, or policies, it calculates the free energy it expects to encounter if it pursues a given trajectory. This requires the generative model to simulate future states and observations.

Expected Free Energy naturally decomposes into two distinct drives that govern all behavior [cite: 8, 22, 23]. The first is epistemic value, which is the drive to resolve uncertainty about the world, effectively maximizing information gain. Actions with high epistemic value generate sensory outcomes that maximally update the agent's internal model, driving exploratory behavior such as saccading eyes to an unseen object or conducting a scientific experiment [cite: 22, 24, 25]. 

The second drive is pragmatic value, which represents the drive to fulfill prior preferences. The generative model encodes a set of preferred target states that the organism expects to occupy in order to survive. Actions with high pragmatic value steer the environment toward these preferred observations, mirroring the concept of reward maximization in traditional behavioral models [cite: 8, 22]. By treating action selection as a unified Bayesian inference problem, Active Inference organically binds perception, learning, exploration, and exploitation into a single mathematical objective [cite: 6, 22, 26].

### Intermittent Active Inference and Computational Efficiency

While standard formulations of Active Inference assume continuous inference and control, empirical evidence suggests that biological organisms often update their control strategies intermittently. Continuous planning at every time step is computationally exhaustive and can propagate correlated noise within closed feedback loops [cite: 27]. 

To address this, researchers have developed Intermittent Active Inference models. In these architectures, agents sense, infer, and act continuously, but they only engage in costly prospective planning intermittently. Re-planning is triggered solely when the prediction error exceeds a predefined threshold or when the Expected Free Energy associated with the current habitual plan surpasses prior estimates [cite: 27]. Simulations of motor tasks indicate that intermittent planning drastically reduces computation time while maintaining task performance, offering a biologically plausible mechanism for managing limited cognitive resources [cite: 27].

## Multiscale Self-Organization and Niche Construction

The mathematical generality of the Free Energy Principle allows it to scale across arbitrary spatial and temporal domains. Because any system bounded by a Markov blanket must minimize its free energy, Active Inference provides a unified language for phenomena ranging from cellular biology to the evolution of complex social institutions [cite: 28, 29, 30]. This multiscale perspective posits that living systems are composed of nested Markov blankets, where the ensemble dynamics of lower-level components generate the macroscopic states of higher-level entities.

### Cellular Morphogenesis and Collective Intelligence

At the microscopic scale, Active Inference has been successfully deployed to model morphogenesis—the process by which cells self-assemble into complex anatomical structures. In computational simulations of embryogenesis, independent cells can be equipped with identical generative models, which serve as mathematical analogs for shared genetic instructions [cite: 29, 31]. These models encode a predicted "target morphology" representing the optimal, low-surprise configuration of the cellular cluster.

Each individual cell independently minimizes its own variational free energy by migrating along chemical gradients (chemotaxis) and differentiating based on signals from neighboring cells. Because all cells share the same internal priors, their local, independent active inference collectively minimizes the free energy of the macroscopic ensemble [cite: 29, 31]. This reframes developmental biology: rather than executing a hardcoded mechanical blueprint, cells act as a collective intelligence solving a distributed inference problem in anatomical morphospace [cite: 32, 33]. Disorders of morphogenesis, such as developmental defects or oncogenesis, can thus be modeled mathematically as failures in cellular inference and precision weighting [cite: 31, 32, 33].

### Extended Generative Models in Eusocial Insects

Scaling to the level of macroscopic organisms, Active Inference accurately models stigmergic coordination in eusocial species, such as ant colonies. In classic foraging paradigms like the alternating T-maze, individual ants possess relatively simple computational architectures and limited sensory horizons. Under Active Inference, the colony solves complex navigational problems by externalizing its memory into the environment [cite: 28, 34]. 

Pheromone trails function as an "extended generative model" [cite: 28, 34]. When an ant deposits pheromones, it performs an active state modification that alters the physical environment. Subsequent ants sample these pheromones as sensory inputs, updating their internal beliefs to minimize surprise and following the chemical gradient. The colony's collective intelligence emerges from the continuous, recursive attunement between the individual organisms and their ecologically constructed niche [cite: 28, 34].

### Variational Niche Construction in Social Systems

In human contexts, the framework extends to "cultural active inference" or "variational niche construction." Just as individual brains minimize free energy, human societies construct shared generative models to coordinate collective behavior and reduce interpersonal uncertainty [cite: 35]. A culture can be viewed as an inherited set of prior beliefs and preferences that are distributed across a population.

| Level of Organization | Agents | Minimization Mechanism | Example Phenomenon |
| :--- | :--- | :--- | :--- |
| **Cellular** | Individual cells | Chemotaxis and differentiation to minimize local prediction errors based on shared genetics. | Morphogenesis; embryonic self-assembly. |
| **Organismal (Brain)** | Neuronal populations | Predictive coding; top-down predictions minimizing bottom-up sensory errors. | Perceptual synthesis; motor control. |
| **Colony / Swarm** | Eusocial insects | Stigmergic environmental modification (e.g., pheromones) serving as extended priors. | Foraging optimization; nest construction. |
| **Societal / Cultural** | Human individuals | Alignment of shared generative models via communication and adherence to social norms. | Cultural evolution; institutional structure. |

Social norms serve as highly precise shared priors that enable mutual predictability among agents. When individuals interact, cooperative communication acts as a mechanism to align their respective generative models, thereby driving down the variational free energy between agents [cite: 35, 36]. This multiscale application frames cognitive boundaries dynamically. Through extended active inference, humans continuously reshape their physical and cultural environments to ensure that those environments generate highly predictable, low-surprise sensory feedback, cementing a dialectic between social conformity and creative environmental modification [cite: 37, 38].

## Clinical Applications in Computational Psychiatry

The translation of Active Inference to clinical psychology and psychiatry represents one of its most empirically fruitful domains. Traditional psychiatry often categorizes mental illness via descriptive symptomatology and statistical clusters. Active Inference, conversely, reframes psychopathology mechanistically as a disruption in the brain's Bayesian inference machinery—specifically, as a failure in precision weighting [cite: 31, 32, 39, 40, 41].

In predictive coding architectures, precision operates as the inverse variance (or estimated reliability) of a signal. The brain must constantly estimate the precision of both its top-down prior beliefs and its bottom-up sensory prediction errors [cite: 20]. If the brain assigns high precision to a prediction error, that error will forcefully update the internal model. If it assigns low precision, the error is attenuated and ignored, allowing the prior belief to dominate perception [cite: 31, 42]. Disruptions in this delicate balance offer a unified explanatory framework for a spectrum of psychiatric disorders.

### Computational Models of Schizophrenia

Active Inference models of schizophrenia focus on a core deficit in sensory attenuation. In healthy individuals, the sensory consequences of self-generated actions are attenuated (assigned low precision) to prevent the brain from constantly updating its models based on expected, routine motor feedback [cite: 31, 42, 43]. This sensory attenuation is what prevents an individual from being able to tickle themselves. 

In schizophrenic patients, a failure to attenuate these self-generated sensory signals results in a flood of unattenuated prediction errors. The brain attempts to explain away this barrage of false prediction errors by forming overly rigid, highly precise high-level priors—manifesting clinically as delusions and hallucinations [cite: 31, 43]. This computational view has inspired novel diagnostic tools. Recent research, including deep learning models applied to early psychosis patients, indicates that subtle behavioral and physiological markers of aberrant action selection can predict the onset of schizophrenia before acute psychotic breaks occur [cite: 40, 44]. 

### Autism Spectrum Disorder and Aberrant Precision

Autism has similarly been modeled as a disorder of aberrant precision weighting, though with a different computational locus. Under the "high, inflexible precision of prediction errors" (HIPPEA) hypothesis, autistic individuals chronically overestimate the precision of low-level sensory inputs [cite: 31, 32]. Because the brain treats every minor sensory fluctuation as highly reliable and significant, it struggles to abstract away noise to form stable, generalized high-level concepts. 

This mechanical failure explains the characteristic sensory hypersensitivity seen in autism, as well as the intense reliance on routine. Routines serve to minimize environmental volatility in the absence of robust generalized priors that can flexibly absorb surprise [cite: 31]. The integration of these computational theories aligns with recent 2025 advances in precision medicine, where large-scale biological analyses have identified distinct autism subtypes that require highly personalized models of neurobiology and targeted interventions [cite: 45, 46].

### Affective Disorders and Interoceptive Inference

The framework also provides deep insights into affective disorders. Depression is conceptualized as a state dominated by highly precise, and hence tenacious, negative prior beliefs [cite: 40, 43]. Because these prior beliefs are assigned overwhelming precision, positive prediction errors (e.g., a compliment, a success) are excessively attenuated and fail to update the patient's internal model of self-worth. 

Furthermore, Active Inference extends to interoception—the brain's perception of the body's internal physiological state. Deficits in interoceptive Bayesian inference, where the brain misinterprets or assigns inappropriate precision to signals regarding heart rate, gut motility, or autonomic arousal, are increasingly viewed as foundational mechanisms in severe anxiety, substance use disorders, and transdiagnostic suicide risk [cite: 23, 40, 41].

## Comparative Analysis with Deep Reinforcement Learning

The dominance of Reinforcement Learning (RL)—particularly Deep Reinforcement Learning (DRL)—in artificial intelligence has prompted extensive comparative research between RL and Active Inference. While both frameworks address the challenge of optimal decision-making in partially observable environments, their foundational assumptions and objective functions differ fundamentally [cite: 22, 26, 47, 48].

In standard reinforcement learning, the agent seeks to learn a policy that maximizes the expected sum of a scalar, externally provided reward signal [cite: 6, 22]. The environment dispenses rewards, and the agent's internal machinery updates value functions or policy gradients to secure higher future yields. Active Inference, however, replaces the construct of an extrinsic reward function with the optimization of the generative model itself. Under Active Inference, an agent treats "rewarding" states simply as states it expects to occupy with high probability based on its prior preferences. The agent operates entirely within a belief-based framework, minimizing expected free energy to align the world with its self-evident preferences [cite: 22, 49].

### Exploration and Handling of Uncertainty

This architectural divergence has profound implications for how agents explore environments and handle uncertainty. In standard RL, the objective function provides no inherent mandate to explore. Exploration must be engineered via ad-hoc heuristics, such as $\epsilon$-greedy action selection, entropy regularization, or appended intrinsic novelty bonuses [cite: 22, 47, 49]. 

| Feature | Active Inference | Reinforcement Learning |
| :--- | :--- | :--- |
| **Primary Objective** | Minimize expected free energy (surprise / uncertainty). | Maximize expected cumulative scalar reward. |
| **Origin of Goal** | Internal prior preferences encoded as target probability distributions over observations. | Externally engineered reward function defining optimal states. |
| **Exploration Mechanism** | Native. Epistemic value (information gain) emerges directly from the objective function. | Engineered. Requires ad-hoc heuristics (e.g., $\epsilon$-greedy) or novelty bonuses. |
| **Handling of Uncertainty** | Explicitly belief-based. Employs variational Bayesian inference to account for state uncertainty. | Often lacks principled uncertainty tracking; prone to sub-optimal "dithering". |
| **Perception-Action Integration** | Unified. Both perception and action operate to minimize the exact same objective (prediction error). | Sequestered. State estimation and policy optimization are often handled by distinct modules. |

In Active Inference, the minimization of expected free energy mandates exploration natively. Because the objective explicitly includes an epistemic value term, an Active Inference agent will actively seek out information to resolve ambiguity about its environment, even in the total absence of "rewards" or pragmatic goals [cite: 22]. This allows Active Inference models to achieve robust performance in sparse-reward environments where traditional RL models plateau [cite: 6].

Despite these differences, recent theoretical reductions have demonstrated that RL can be formulated as a special case of Active Inference [cite: 26, 49]. If an environment features no ambiguity (zero epistemic uncertainty) and an agent's prior preferences are strictly equated to an RL reward signal, the minimization of expected free energy collapses into the maximization of expected utility, mirroring the Bellman equations of traditional RL [cite: 8, 26, 49].

## Integration with Artificial Intelligence and Autonomous Agents

While Active Inference originated in theoretical neurobiology, the rapid scaling of Artificial Intelligence—specifically Large Language Models (LLMs)—has accelerated the adoption of the framework as a blueprint for autonomous agent architecture. As AI transitions from static pattern-matching to deliberative, multi-step planning, researchers are utilizing Active Inference to structure agentic workflows [cite: 25, 50, 51, 52].

In the current landscape of AI development, standard reinforcement learning and autoregressive token prediction suffer from significant data inefficiency, lack of robust exploration, and a reliance on externally engineered rewards [cite: 50, 53]. Integrating LLMs into an Active Inference framework resolves several of these bottlenecks by bridging the "grounded-agency gap" [cite: 50].

### Large Language Models as Generative World Models

In these hybrid architectures, the LLM serves as the generative world model. Thanks to extensive pre-training on vast corpora of human text and code, modern LLMs possess sophisticated implicit models of world dynamics, analogical reasoning, and state transitions [cite: 50, 54]. However, they natively lack intrinsic motivation and formal decision-theoretic bounds. 

By embedding an LLM within an Active Inference control loop, the agent uses the LLM to hallucinate forward trajectories, calculating the Expected Free Energy of each potential path. The agent then selects the action that maximizes information gain and goal realization [cite: 50, 54]. This facilitates natural epistemic exploration. When faced with a complex software engineering task or an open-ended mathematical proof, an Active Inference-driven LLM agent will autonomously generate experiments—such as writing and executing a test script—specifically designed to yield data that disambiguates between competing hypotheses [cite: 25, 54, 55].

### System 2 Reasoning and Inference-Time Search

The application of Active Inference aligns directly with the industry-wide shift in 2025 and 2026 toward "System 2" reasoning in AI. Historically, AI performance scaled primarily through increased pre-training compute. However, as pre-training returns begin to plateau, the focus has shifted to inference-time search (test-time compute). 

| Prominent Open-Source AI Agent Frameworks (2025-2026) | Primary Use Case | Alignment with Active Inference Principles |
| :--- | :--- | :--- |
| **LangChain / LangGraph** | LLM-powered applications, memory management, tool usage. | Provides the scaffolding for cyclic perception-action loops and external memory updates. |
| **Auto-GPT / AgentGPT** | Autonomous task execution, web browsing, planning. | Simulates goal-directed behavior, though often relies on heuristics rather than strict free energy bounds. |
| **MetaGPT** | Multi-agent collaborative software development. | Models social Active Inference; agents share generative models to reduce mutual uncertainty. |
| **Spec Kit (GitHub)** | Spec-Driven Development (SDD) via LLM generation. | Establishes highly precise prior preferences (specs) to guide agentic code generation. |

Extensive benchmark data from late 2025 and early 2026 demonstrates that inference-time search mechanisms—such as Monte Carlo Tree Search combined with generative diffusion or Active Inference loops—drastically elevate model performance [cite: 52, 53, 56, 57]. For instance, providing agents with structured time to explore alternative solutions and minimize uncertainty during execution has allowed models to surpass human-level performance on rigorous reasoning benchmarks, including securing Gold Medal equivalence at the 2025 International Mathematical Olympiad [cite: 57]. Active Inference provides the formal mathematical bounds for how this inference-time search should be optimized to balance exploration and exploitation [cite: 6, 25, 53].

## Theoretical Criticisms and Methodological Vulnerabilities

Despite its mathematical elegance and cross-disciplinary adoption, the Free Energy Principle is the subject of persistent theoretical critique. A primary line of contention surrounds the principle's falsifiability [cite: 1, 58]. Because the Free Energy Principle is formulated as an unconditional mathematical identity, critics argue that it operates as a tautology rather than an empirical scientific theory. 

Proponents acknowledge this, characterizing the framework as a principle akin to calculus or the principle of stationary action; one does not "falsify" the principle, one merely assesses whether specific biological or artificial systems conform to it [cite: 1, 58]. However, for the framework to be scientifically useful, it must generate specific, testable process theories. 

### Malleability of Generative Models

Critics argue that the framework is overly malleable when applied empirically [cite: 58]. Because researchers can define the state space, the generative model, and the prior preferences arbitrarily to fit any observed phenomenon, it becomes difficult to establish what the framework explicitly predicts versus what it merely accommodates post hoc [cite: 58]. If an organism behaves irrationally or fails to achieve a goal, the observer can simply declare that the organism was optimizing a different, hidden prior preference. This extreme generality threatens to dilute the explanatory power of the framework, demanding rigorous, preregistered experimental designs to isolate specific hypotheses.

Furthermore, there is a severe implementation gap in translating the theory to complex engineering tasks [cite: 54]. While the theoretical equations of Active Inference are mathematically pristine, calculating exact Bayesian posteriors in high-dimensional, continuous state spaces is computationally intractable [cite: 49]. Biological brains resolve this via physical self-organization, but translating this to silicon requires aggressive approximations. Early discrete-state implementations were limited to trivial grid-world environments, and while deep neural network integrations improve scalability, they often sacrifice the transparent probabilistic guarantees that made the theory attractive [cite: 54, 59].

### Institutional Pressures and Research Integrity

The rapid proliferation of Free Energy Principle research has also highlighted the institutional pressures inherent in modern academia. The drive to apply the framework to novel domains has occasionally led to methodological vulnerabilities. In 2026, the scientific integrity committee at Radboud University reported a case involving a researcher who fabricated and manipulated data in an academic article investigating Active Inference frameworks for social human behaviors [cite: 60, 61]. The individual was found to have duplicated data and altered results without justification, underscoring the necessity for independent validation and robust empirical scrutiny as the field expands rapidly [cite: 61].

Despite these hurdles, the Free Energy Principle and Active Inference remain among the most ambitious unifying frameworks in modern science. By bridging statistical thermodynamics, evolutionary biology, computational psychiatry, and artificial intelligence, the framework offers a mathematically rigorous hypothesis for how organized matter resists entropy, learns from its environment, and acts with purpose.

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52. [Causal inference and bias in learning analytics](https://research.monash.edu/en/publications/causal-inference-and-bias-in-learning-analytics-a-primer-on-pitfa/)
53. [Filling the gaps in Active Inference](https://www.noumenal.ai/post/filling-the-gaps-in-active-inference-1)
54. [Demystifying Active Inference Reward Systems](https://www.oxford-man.ox.ac.uk/wp-content/uploads/2020/11/Active-inference-demystified-and-compared.pdf)
55. [Epistemic exploration in belief-based settings](https://pubmed.ncbi.nlm.nih.gov/33400903/)
56. [Empirical Comparison of Active Inference and RL](https://www.researchgate.net/publication/389774542_A_Systematic_Empirical_Comparison_of_Active_Inference_and_Reinforcement_Learning_Models_in_Accounting_for_Decision-Making_Under_Uncertainty)
57. [From Control-as-Inference to Active Inference](https://satyamcser.medium.com/from-control-as-inference-to-active-inference-8625a585e3c1)
58. [Free Energy of the Expected Future RL Objectives](https://baicsworkshop.github.io/pdf/BAICS_37.pdf)
59. [Accessible overview of discrete-state formulations](https://pubmed.ncbi.nlm.nih.gov/33400903/)
60. [Scaling RL and Active Inference limits](https://www.beren.io/2024-07-27-A-Retrospective-on-Active-Inference/)
61. [ERNIE 5.1 Release Note (Baidu)](https://ernie.baidu.com/blog/posts/ernie-5.1-0508-release/)
62. [Flat prior preferences and Q-learning comparisons](https://www.oxford-man.ox.ac.uk/wp-content/uploads/2020/11/Active-inference-demystified-and-compared.pdf)
63. [Neuroscience Shaping AI: Verses AI and Friston](https://www.kungfu.ai/blog-post/from-brain-to-machine-how-neuroscience-is-shaping-the-future-of-ai)
64. [Active Inference Implementations via LLMs](https://medium.com/@mbonsign/we-solved-active-inference-friston-was-right-but-implementations-have-been-wrong-fafbd5d22f31)
65. [Karl Friston on System 2 Reasoning and Active Inference](https://www.youtube.com/watch?v=WU56kbgMSNE)
66. [Biomimetic Mathematics of Active Inference for AI](https://www.researchgate.net/publication/395626839_From_artificial_intelligence_to_active_inference_the_key_to_true_AI_and_the_6G_world_brain_Invited)
67. [5th Applied Active Inference Symposium Keynote](https://www.youtube.com/watch?v=VTivWre-8Kk)
68. [LLM Agent Frameworks 2025 Github Repository](https://github.com/masamasa59/ai-agent-papers/blob/main/lectures/2025_trend.md)
69. [LLM Agents Papers List (AGI Edgerunners)](https://github.com/AGI-Edgerunners/LLM-Agents-Papers)
70. [Top Ten Github Agentic AI Repositories in 2025](https://odsc.medium.com/the-top-ten-github-agentic-ai-repositories-in-2025-1a1440fe50c5)
71. [Open Source AI Agents Directory 2025](https://huggingface.co/blog/tegridydev/open-source-ai-agents-directory)
72. [Top 10 Open Source AI Agent Frameworks](https://opendatascience.com/top-10-open-source-ai-agent-frameworks-to-know-in-2025/)
73. [Active Inference in Psychiatry Symposium](https://www.pug2025.org/sessions/active-inference-in-psychiatry%3A-understanding-mechanisms-of-psychopathology)
74. [Active Inference Unifying Psychology](https://pmc.ncbi.nlm.nih.gov/articles/PMC11507080/)
75. [Autism Science Foundation 2025 Review](https://autismsciencefoundation.org/2025-year-in-review/)
76. [Autism Research Breakthroughs 2025](https://linksaba.com/promising-autism-research-breakthroughs/)
77. [NewYork-Presbyterian Psychiatry Innovations](https://www.nyp.org/professionals/innovations-in-review/2025/psychiatry)
78. [InstaDeep Inference-Time Search Breakthroughs](https://instadeep.com/2025/11/breaking-the-performance-ceiling-in-reinforcement-learning/)
79. [LLM Trends and Benchmark Statistics 2026](https://llm-stats.com/ai-trends)
80. [OpenAI Gym Baselines Active Inference Comparison](https://www.oxford-man.ox.ac.uk/wp-content/uploads/2020/11/Active-inference-demystified-and-compared.pdf)
81. [MLPerf Inference v6.0 Benchmark Results](https://mlcommons.org/2026/04/mlperf-inference-v6-0-results/)
82. [Epoch AI Trends on Compute and Inference Costs](https://epoch.ai/trends)
83. [Top LLM Research Papers May 2026](https://www.analyticsvidhya.com/blog/2026/05/top-llm-research-papers-2026/)
84. [AI Agents of the Week Research Papers](https://www.llmwatch.com/p/ai-agents-of-the-week-papers-you-be0)
85. [Intermittent Active Inference (IAIF)](https://www.mdpi.com/1099-4300/28/3/269)
86. [Navigating Open-Source LLMs for Agentic Tasks](https://www.bentoml.com/blog/navigating-the-world-of-open-source-large-language-models)
87. [Awesome AI Agent Papers Github](https://github.com/VoltAgent/awesome-ai-agent-papers)
88. [Variational Niche Construction Theory](https://publish.obsidian.md/active-inference/knowledge_base/free_energy_principle/applications/social_sciences)
89. [Dialectic of Conformity and Creativity Models](https://arxiv.org/abs/2604.09026)
90. [Cognitive Niche Cause-Effect Models](https://pmc.ncbi.nlm.nih.gov/articles/PMC9292365/)
91. [Active Inference Institute Research Output](https://www.activeinference.institute/research-overview)
92. [Active Inferants In Silico Experiments](https://sussex.figshare.com/articles/journal_contribution/Active_Inferants_An_Active_Inference_Framework_for_Ant_Colony_Behavior/28695176)
93. [System 2 Research Benchmark Repositories](https://github.com/open-thought/system-2-research)
94. [AI Benchmark Relevance Report](https://www.reddit.com/r/LocalLLaMA/comments/1rovfbw/i_made_a_list_of_every_ai_benchmark_that_still/)
95. [Best of 2025 AI Reasoning Models](https://www.apolo.us/blog-posts/the-year-in-ai-best-of-2025-part-i-reasoning-models-llm-agents-and-more)
96. [Top 10 Open Source Reasoning Models 2026](https://www.clarifai.com/blog/top-10-open-source-reasoning-models-in-2026)
97. [CoreWeave Inference Speed Benchmarks](https://www.coreweave.com/news/coreweave-achieves-1-ranking-for-inference-speed-and-price-performance-for-moonshot-ais-kimi-k2-6-model-in-independent-benchmark)
98. [Wikipedia: Free Energy Principle](https://en.wikipedia.org/wiki/Free_energy_principle)
99. [Process Theory Detailed Mathematical Formulations](https://activeinference.github.io/papers/process_theory.pdf)
100. [Mechanisms and Key Players of FEP](https://ndstress.wordpress.com/research-and-publications/keystone-players/free-energy-principle-karl-friston/)
101. [A Rough Guide to the Brain: Free Energy](https://www.fil.ion.ucl.ac.uk/~karl/The%20free-energy%20principle%20-%20a%20rough%20guide%20to%20the%20brain.pdf)
102. [Free-energy principle and optimization theories](https://www.uab.edu/medicine/cinl/images/KFriston_FreeEnergy_BrainTheory.pdf)
103. [Markov Blanket Active Inference Partitions](https://www.researchgate.net/figure/The-Markov-blanket-and-active-inference-A-Markov-blanket-is-a-set-of-states-that_fig5_330578698)
104. [Mathematics of Markov Blankets](https://publish.obsidian.md/active-inference/knowledge_base/mathematics/markov_blankets)
105. [Self-Organization and Markov Blankets](https://pmc.ncbi.nlm.nih.gov/articles/PMC5805980/)
106. [The Emperor's New Markov Blankets](https://philsci-archive.pitt.edu/18467/1/The%20Emperor%27s%20New%20Markov%20Blankets.pdf?utm_source=chatgpt.com)
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32. [osf.io](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHZTkVkDhrlUkszz5a5C2MdFZb-66nihfEkrDHs71t62GCOqDHicj3GZYnCTvgU2kDoWGNKeux4B1xj6VEa7rLd2MR0Qdwx9KOawmV-0Xl8RKj03TcySvpmnprcxd9m)
33. [nih.gov](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQH00Is7rr94PFgYxQJes1iXux-jGzY3z-l6IFaOBNO1kalVF6qj65aFLTE0mx9py5MXasRx6tsiCbOMkSqNcUJnshse-216STYgelZlJVqAyh7d3RT43KyjiEHrRklHJw==)
34. [figshare.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQGa-y5uMykyRByfP5KDsi8kYu4DmN7314vL6Z8pZ6ekFSkEXN8dN6OtU-gQglRkTodj2oaNj82W96svK9ZVNZSEoP3UieAHJ2CGXKz_ELr2M_iuWJUCVTCsJQmsEQS_w4V9P-YZrpKFktIp6jneSA7cBOkTe4vTpitj2ZC32aJQ9oueHAMiW7kpArWhcwRmRRnGEgLhDpuAAYXe8T04t3ICPhSAkHDZAnABnsqs2kHbl29Dxt2wjHyngnXPUrLdFEE=)
35. [obsidian.md](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFubiBJE2fwNz8SkkeMQieUO4syW9sPyLUiQSe9YMdFWhtHbUk7ueyZifSk0sH1lgmagSszAS9-j45jpQo8XOw10MQr5v3zSBWHxK670xC8a_DpD2HQB6gXeDLSgeFnLZOV-Q6zKl4AGHzLd83zhD4c_SnWhKA8Kqc5gxEXo_3Uat--hdzyYWc9yXYwAwXixm3k2l3dCnSMiuRKzrMaurJkrX6AOQ==)
36. [frontiersin.org](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHXglhqxvls1FIZJw2o8qa3fvkV7e774rHuzu7HllwBgQRorT-NIJdG3e17R4n27jWgVlsJlYgvlnxbdkkVerAx42jgCmnMrGiHP2DQESSkg7E_W8kyjZ6ZsXesPm4-8BcDKnEytMDGKky-0vOK820Yk3SMk9iBuX-l-_AQpQCFyQCG7L2--FH3-Do6mw==)
37. [nih.gov](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFHPgDylB8RZSQ804PE4mXtSXEacxYkGVXkYSR-oR7Qr4TquNlpA68-Nt62f8wSOmtcN2K4TR6dKFIgf3MVwbC8l9ggmam-JL4Kt9EjKneGq-r46zfO8Y5P6VxEKeQha0QWu-apjELW)
38. [arxiv.org](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFezQ-BZ1-xcRnYmdkLTCE0P7v7e_ipLn_0spmdxCtQr8ef9FCDlPDMGPGHXMZmKXqiZDD1LOJBTqrjd-9IwlpFBalzITnX8Ee5V5xQSxpW9XHOnDk3zw==)
39. [mdpi.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHFXKpFPBYa1zYEhSKT-b5XLWdxCa46qIE2x0KERIbRsC6yV_tzUJPC4DY8VQBtO14kiEOJwwiP4mk0KA2EOdrFvt6QYBl6fUypse83_ANQpd2Zd9_HeEnnYyWIzWqh)
40. [pug2025.org](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQF8sQV66g_8VBykABLzzyrR9MAipUxhh8AW0bSz13yljT1UzJps_zdXgGm_d0r-1rxs6Omr-TFTW2G-KBfxDj7b-RSuHs_iq9kBsConRTrXQG60qC64nw_6BxQl8VTTS8eycL3KMXGABns6j9v5NgMws-a6xVzaXBFzA6oURkizMWtW7YgdH0dD10AMikRcYJ9F93Wer4BbH9pLubNMajg8X72S5Q==)
41. [nih.gov](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFionISfBYuM-GU3NeJQaDUfZS4T0XMLqqtppVmpi5sYMg_2CNoHaMPmQDWSmkFvlecZaAXXrC1VDYL5J0JgHuMAVMCg3K6RrbgCnNPF-4kdiX5DkKuk5fVSS_gYATZkkq5V19e4G2Xeg==)
42. [frontiersin.org](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQH72H-TWzoETJZS7U71FVZ4WNk6NxeN3noozrQNzmVIVEHFmT7hnI76KSGl_Vd1Wscr1EmCo4euTYex2b5iE-BWONgT-TSWfqQ03eVw-Xpfvg1orkCsc2GurGabziWXGrR6epsnKH4dlZIT5cDGJlN3kfEE3sXP745NtzIuEUwMlaDhS6RkvtDFn1AS24UFXE0oPJpsml7WWrn02kWC)
43. [nih.gov](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHo8IULn5imLq_7shsjTJigscnnsVXuJZ3wWMW7OcrVvsVwbUnjdt5qnyezEJM1LqCzNzQojcDUM76rDHf1Xc_eQg5XS_M3P1ftwoyV8vrE3JJecMkaXKZCu_egAFJDqYGMozO_1ojH)
44. [nyp.org](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFhq2s1dvXwdCvjLQsS9gmrsRZvj6Ibl-t5lvpRs_tJNMrJen57VV7WfBb-RRKl3KD94nD5an3s3x9pc7j4WRv7I2AjctE2zYodDFJbzjTPkVky3iOa6j8kOMwkXBnJRj-Waq7QOBujYotPwJqwuDnMjKNqUF1d0B7GAnYyGw==)
45. [autismsciencefoundation.org](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFcAn8fEm6vu1WDVYrw5oWOi9o18M919ZfcFcKs9giUF9mWcoSfHc4YzLuyWAzwSMPFaNqPclTBTFmulznMZh8H41CnmdGJy3cW7ta7tmcNgV3HVhkeImujP5dXCAtIwhQnRqNiNqWCetlR9CGQZQ==)
46. [linksaba.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQF1OAl1b2St0DXMrCMkGPhfcAB4OZ7DObg76pOBmFomKWa1Hmli0lOxo5TimL81nDcBtzhf5sypLVl6PWstJ-gQ0ZS5fjbjt_MXO6M8xZ7VObzDeg7OhDerRah0lYOnHeDSNf4oDfAkTusa7YblYYZhndtY)
47. [arxiv.org](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQG1FBD5KhJXpglV2zDl2wbmROtWmmY8M0gytJS-AGlcGYrnjNjY_5acavq_o_QGkm6CQ8hqCxolMaU_kTgXvVlvXKHytQ_PeK0AJhGpRHPJxZDO0IFYGw==)
48. [noumenal.ai](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQGskJ4FHCv_KauH2hYtv-6fX4KmGU1t6Ou_16zKdKgciomU6soA2-i7n06NLufeQG7NX91cYFpBK5qIcCJhz5ILbEYmY9Q9kGK3fsQr9bkgx7JBIyGm3EQIRRGHp4Ap9KtAVe4W3eUI5E8zadnRZ-Jw9JcpacOCCgBq)
49. [medium.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHheuuJfPupaLO9FMx0C_RZYVbQI7Pzl33bg-MB0fXrQcbi6_vXKCuqAcaiwcfV_WX4ZhvJG7521OdK9c05N3zxYWYUPfZ1xmFX_RxYlroTURoJD8UPDG6eyl7-TUJmcyLuGp8SutEIqZ71iFtssym2tqEpUgvh5zxHIuYL9l9gBlv1hAL0b38oHdB8a_eO)
50. [Link](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHCtG1H0EvR4jFVrMdzkfz42_xvVpyfFzc8Gr-3j6Asfvl00Nqfn0Ml7Cdgxfxze36t6ggZDPWEGqnG8X-RCps-tVTZDPHHQHPpsJIzH52IsbCCBH0R3fytnw==)
51. [kungfu.ai](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQE0bZRkZPsmWSVcJxNeI4En3H2i_S7Bh3O5bP-RZT-EViP2IRwzxWZ8IcvfHuOfjiAEK6mlS3sOC9PFJfyMt6JNFDCoLDR1B9qfg_Qv-jbFBRFF_q7Q_N5blH0a2vvtIDsWzkLz-I-i-7g5jZbeXZedPq-0KMrRO5tyffS7PHh2tv4kudqskRkf8Ws9J3jmMyrLS-TUyAHKKw==)
52. [github.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQH2enWiE-gZo3pUaeSiUjj40n0B6xuzx7GllDuStIvtoADzMA_xNFhzEH0yWCrHSpv5xTRcEia9XLZJlY7XDbTuTb4Y9nytHHc04P3t6UMm_aaOXNMKJ6qOPr0nQF34Wp8LcxaenbE7)
53. [instadeep.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQH6eREyvPlBX0tE0UqYGRs3IhwPuz01dFU0HLTB9NzGEzlSCjINRhErLapyL8SUerkOcbjuHlYa5FJW-gdv_gmHyXTb0I2ojP6V3xiAl7y0rZTJAoUCfnIQWJDm4ObqnRbhvvm56jM55LlnqYDAuwUzSEzf98wiR5AaNrwDU-dp3TE_m3V2dv1dAOXBc0wC1Q==)
54. [medium.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFUWr1F7ljmecLM7zS8YMWKoA5TkjLAmYnjGKUMPZTucDLwXN54_jqZvNJPTSQscm2ZNoMaBIF3bcRp9bzwzZdrjcOKZb-6eosqOx6H5PDoDfXSCyrHpOnb5873X3ovKB2s2WGGWAHZkcteLpL92imLSckdPAVn5dNdK0FTaBCDJ_h3z9gnm2kSgfwha7mczhX7-EaUdwoZC_W0VDs7V4kGu4zo5RfJgLn-y9Lf_yeL_A==)
55. [github.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFcT-hsTazeoIt-OIWq9JnAvu2VRF9TNWkv9_cbJD3oefQ9LvjHnLYmQYIVlH1mSH3-ISlwXpPotIGacHtnzvefrZXwEM76pl8IQ7Gu9b6oydsltnbcVjZNsyz33F1ouKPH3_jNapRJ6dee)
56. [analyticsvidhya.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQEGl0JCaQD0UaPfPJaMN8T1BUyBi1UXTro5BWRsAr9DwQFBDLnydnt9757ZFtbBOHDCltLYbL1KvhNN81rlNs2DpL1_Ub1kmbdL-NZ691N8A_kD1BUV8G7VmRakLZzpdKdsjF5wLPByOzLwZQPRzFT_F0JDzGAvnhHNjxWVyppDvA==)
57. [apolo.us](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFCFtgjlYCJEY5krBnTFp75U2wIN2YVyco1qR2y7U3VaeS5Apx4a_2N7VVq7qWESZ30UNw0Y6cJEfFUGwbZ6NDq79TSAeev5N3B08hQD3mjrRafG8i2-5UnSNpxq-rGCSprgHFRFYBBG7S4gpf0V879r0yRtkAOzanFJiohp5V3haoimZbTykoLmRqRc2yF_kCNdY0jU2Zfj8_0nIk0)
58. [Link](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHjucrNFiqEB_Q2YOypPshMCmwlx9K2RxmTCsTUPtOUw0ZztRtfbIUXaZwNt3aqE6ycaNhQRIS6rHffwOVLtVfQg--JJNwk004esmOYK7Z1sVblW4JXlBXSIXNPNZk_11-ajg==)
59. [rit.edu](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFIfUg0V5yzFpmUxMAcVtnAqCGWwQ96WQj2KEyWh1YDRxz0Vc5HLUtStcxgWYWUIV4ItWCLRKFfReJPLco8oT3Y1dmVAkonm68FilBQAxq2pRgbMXqPmuRBcK22_1eqXcrj9TdN4qiCa217GykoIrX6Tpk1I_xW92OEq_rLMLXnQ6OGTAfPTqfUFahjgmaKqS6LYf1ZDmY=)
60. [tudelft.nl](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFGXAVH4hIKg8uPhQXshK7UO81OIEkuxXj_CQcnJYGhzFxjtGc0_0JlcSqR2Pm6cp5TtG4wFtWZrxhMWF_-Re2gM7VT-1bF96-tavR_bAbGKkQQLECLB6M-oep4-sLfYaZcRnzzQeaXMWR3QCgyX6W3iRwtpJikZful8fma9ONcETv0Lin4765F2njlfw==)
61. [voxweb.nl](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQGUcf1Cxr2_hD3xeQMh8-JZ6hrfGeCY4tjwbA22Qs3KOvU8mu0f_do47hvwwq0_Yr87r0_msdgE0_rt_KvrkJpsfHTuNpG7alsaLF0Gk5rVWA8BHDT7yca4PA_nN_LkQOcvcd8bODxbz9N8fxa75dchTMssfCMUYnBQAO3M4Dw6CrRQb2AbhLTDBjz0jJOcMFMLx5Xoldvw4XftTp0UA3ON-PwrPdfUWHK8jPO5j8ycjegPgOpi6yNCvA==)