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Training-Inference Mismatch: Why Your LLM Reinforcement Learning Is Optimizing the Wrong Policy

Reinforcement learning has become the defining ingredient of modern LLM post-training. GRPO, PPO, and their variants drive the reasoning capabilities

The vLLM v0.23.0 release landed last week with 408 commits from 200 contributors, and it packs several changes that directly

Entering the AI space feels like learning a new language. Everyone throws around RAG, RLHF, GGUF, MoE, MCP like you’re