Understanding AI deep dive: reinforcement learning with minimum math made agents like o3 possible

binarybits · x · 2026-11-03

Timothy B. Lee launches 'Agent Week' at Understanding AI with a jargon-free deep dive into reinforcement learning — the post-training technique behind agentic models like Claude 3.5 Sonnet and o3. The piece traces the 2023 BabyAGI/AutoGPT hype cycle, then argues reliable agents required going beyond next-token pretraining. Upcoming installments cover MCP and tool use (paywalled), with a 20% annual subscription discount this week.

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