John SchulmanA

Schulman co-invented PPO and led the RLHF research that made ChatGPT possible. As an OpenAI co-founder and research lead, he shaped alignment techniques now standard across the industry. Departed for Anthropic in 2024, signaling deeper focus on safety. Tone: deeply technical, prefers research papers over public debate, quiet authority in alignment community, lets algorithmic contributions speak for themselves.