A standard API for single-agent reinforcement learning environments, with popular reference environments and related utilities (formerly Gym)
Gymnasium is the maintained successor to OpenAI Gym: one API that every RL algorithm and environment speaks.

Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.
Claim its page: indexed whatever its rank, translated into six languages, and enriched with what you write yourself.
Get an email alert on its next release or when it starts trending — never miss the moment.
Free · no card · unsubscribe anytimeA standard API for single-agent reinforcement learning environments, with popular reference environments and related utilities (formerly Gym)
Gymnasium has 12.4k stars on GitHub. It has been forked 1.4k times. Gymnasium is written mainly in Python. It has been in active development since 2022. Gymnasium is available under the MIT license. Its main topics are api, gym, reinforcement-learning.
Read the full guideA standard API for single-agent reinforcement learning environments, with popular reference environments and related utilities (formerly Gym)
Gymnasium is an open-source project. It is released under the MIT license.
Yes. Gymnasium is free and open source — you can use, modify and self-host it.
Gymnasium is available under the MIT license.
Gymnasium is written mainly in Python.
Add this live badge to your README — your GitHub stars and directory rank, refreshed daily.
[](https://olud.ai/project/farama-foundation-gymnasium.html)
Measured from GitHub topics shared by both projects, weighted by how rare each topic is.