How LLMs Learned to Reason: SFT --> RLHF --> RLVR
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1. The Starting Line: The Last Non-Reasoning Flagships GPT-4.5, DeepSeek-V3, and Claude 3.5 Sonnet share something that has nothing to do with benchmark scores: they were the last major models built entirely on the "pretrain, then instruct-tune" recipe. All internal computation was done in one forw…
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- 2026-09-09 00:09 · DEV Community — AI
How LLMs Learned to Reason: SFT --> RLHF --> RLVR