2min chapter

The TWIML AI Podcast (formerly This Week in Machine Learning & Artificial Intelligence) cover image

AI Trends 2023: Reinforcement Learning - RLHF, Robotic Pre-Training, and Offline RL with Sergey Levine - #612

The TWIML AI Podcast (formerly This Week in Machine Learning & Artificial Intelligence)

CHAPTER

RLHF

The basic idea that was described in the instruct GPT paper was that you could take the response from the language model and you could treat it as a reinforcement learning problem. In reality, getting humans to label every single thing the model says is expensive. So what they do instead is they actually train a separate neural network to act as a reward model. And then they run a standard banded RL algorithm in this case based on PPO.

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