mental-world/Mentis

Hypothetical Minds is an autonomous LLM-based agent for diverse multi-agent settings, integrating a Theory of Mind module Theory of Mind module that scaffolds the high-level planning process by generating, evaluating, and refining hypotheses about other agents’ strategies in natural language.

Open infrastructure for training, evaluating, and deploying System 1 decision models across language and multimodal backbones.

A curated list of decision models (System One / typed decision models): hosted APIs, open-weight models, runtimes, SDKs, applications, benchmarks, and papers.

System 1 decision models (Jev, Laya, Cua-S1) as brain for agents: Browser use, computer use, games and robotics

A family of System One-style models fine-tuned from Qwen3.5, designed for one-pass typed decisions with calibrated probabilities.

LLM framework for building multi-agent simulations

Extension to the Mesa repository to provide with the ability to plug LLM directly into your agents for more complex reasoning and inter-agent communication ! Make your own reasoning/memory/communication modules and plug them into the existing code or use the pre-built ones for fast building.⁦

Contrastive Language Models (CLMs) are a new class of System One model trained with a contrastive learning objective that connects states and actions.

A curated list of research and projects on world models