XGrammar Constrained Decoding — Drop Retry Rates from 38.5% to 12.3%.

Stop parsing JSON with regex. XGrammar modifies the probability distribution at every decoding step to force schema-valid output, compiling EBNF grammars to finite-state machines with near-zero overhead. OpenAI's structured output hits 100% schema validity; Anthropic reaches 99%+. For high-throughput pipelines, this eliminates the retry tax entirely. DEV Community