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#constrained-decoding

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01 ·Inference & Serving·★ MEMBER·PAPER·11 min read Structured Output and Constrained Decoding — How to Stop an LLM from Breaking Your JSON Instead of asking a model nicely to return JSON, you can drive the probability of every grammatically illegal token to exactly zero before it is ever sampled. A from-scratch walkthrough of constrained decoding — logit masks, vocabulary indexing, what function calling really does, and why syntax guarantees are not content guarantees.