PufferLib: open-source RL library trains 60M samples/sec on one GPU

jsuarez · x · 2026-11-11

Joseph Suarez (Neural MMO) says his small-model RL stack is pure C/CUDA C, hitting up to 60M training samples per second on a single GPU. PufferLib is a free, open-source RL library that trains tiny super-human models in seconds, with in-house algorithms (PPO variants), Protein/CARBS hyperparameter tuning, and custom simulation methods. RLC 2025 Best Paper; extensive engineering blog series; commercial support available.

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