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A free online book and course on RLHF, preference tuning, reward models, RLVR, and post-training language models.
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Post-Training Course by Nathan Lambert
Free course lectures on RLHF, reward models, preference tuning, RLVR, and modern LLM post-training.
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Reinforcement Learning RLHF and Post-Training Book by Nathan Lambert
Policy gradient methods for RLHF and LLM post-training, including PPO, REINFORCE, RLOO, GRPO, and implementation details.
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