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Diagram showing PPO four-model architecture for LLM training

PPO for Language Models: The RLHF Workhorse

Deep dive into Proximal Policy Optimization—the algorithm behind most LLM alignment. Understand trust regions, the clipped objective, GAE, and why PPO's four-model architecture creates problems at scale.

Series

Policy Optimization for LLMs: From Fundamentals to Production Part 2

Jan 18, 2026 ~28 min

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Articles tagged ppo

PPO for Language Models: The RLHF Workhorse