lucidrains/PaLM-rlhf-pytorch

Implement a ChatGPT-like LLM in PyTorch from scratch, step by step

Train transformer language models with reinforcement learning.

Agent Reinforcement Trainer: train multi-step agents for real-world tasks using GRPO. Give your agents on-the-job training. Reinforcement learning for Qwen3.6, GPT-OSS, Llama, and more!

verl/HybridFlow: A Flexible and Efficient RL Post-Training Framework

An open platform for training, serving, and evaluating large language models. Release repo for Vicuna and Chatbot Arena.

A straightforward method for training your LLM, from downloading data to generating text.

A minimal PyTorch re-implementation of the OpenAI GPT (Generative Pretrained Transformer) training

slime is an LLM post-training framework for RL Scaling.

LLM training in simple, raw C/CUDA