What is RLHF?

RLHF, short for Reinforcement Learning from Human Feedback, is the alignment technique introduced by OpenAI in InstructGPT (2022) and used to train ChatGPT, Claude, Gemini, and most major commercial LLMs. The technique trains a reward model on pairwise human preferences ("response A is better than response B"), then uses reinforcement learning (typically PPO — Proximal Policy Optimization) to optimize the base model against the reward model. The platform strengthens enterprise readine