HuggingFace TRL
TRL (Transformer Reinforcement Learning, now stylized as Transformers Reinforcement Learning) is an open-source Python library maintained by Hugging Face for post-training large language models with…
Reinforcement Learning
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Microduck
Microduck is a small biped robot developed by Pollen Robotics, the robotics team within Hugging Face.
MuJoCo
MuJoCo (short for Multi-Joint dynamics with Contact) is an open-source physics simulator designed for fast and accurate simulation of articulated mechanical systems with rich contact interactions.
OpenAI Baselines
OpenAI Baselines is a collection of open-source, high-quality reference implementations of reinforcement learning (RL) algorithms released by OpenAI.
RAGEN-2
RAGEN-2 is a 2026 research paper and public code extension for diagnosing and mitigating reasoning collapse during reinforcement learning of multi-turn large language model agents.
River AI
River AI (legally River AI Inc.) is an American artificial intelligence company based in Palo Alto, California, founded in 2026 by Igor Babuschkin, a co-founder of xAI.
SkyRL
SkyRL is an open-source reinforcement learning (RL) library for post-training large language models and multi-turn agents.
Tülu 3
Tülu 3 is a fully open post-training recipe and a corresponding family of instruction-tuned language models released by the Allen Institute for AI (Ai2) on November 21, 2024.
Xiaomi MiMo-V2.6
Xiaomi MiMo-V2.6 is a family of open-weights omni-modal mixture-of-experts language models released by Xiaomi's MiMo team on 21-22 September 2026.
openpilot
openpilot is an open-source driver-assistance system developed by comma.ai and its user community.