Dev recalls fighting for structured output in GPT-3 days as dynamic inputs now parse in <200ms

blixt · x · 2026-09-16

Developer @blixt recalls spending lots of time coaxing structured data out of GPT-3/3.5-era models, when constrained decoding was a lifesaver. He argues the new approach reinvents that concept at scale: good results for dynamic inputs in under 200ms. Responding to skepticism, he says the attention isn't just hype — it's one of those obvious-in-retrospect ideas that someone actually shipped.

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