PufferLib Choose the version before choosing an API. Reviewed 2026-10-01 : | Profile | Status | Main use | |---|---|---| | Native source | Current default branch and live documentation | C/CUDA environments, native trainer; CPU evaluation only | | | Latest PyPI release, published 2025-06-23; sdist only | Python/Gymnasium/PettingZoo adaptation and Torch PuffeRL | | Pinned source | Historical snapshot | C Ocean interface with an optional Torch fallback | For 5.0 , read references/native-5.md. The reviewed revision is . Its CLI is after building an environment, not . There is no 5.0 Python emula…