Changelog | OpenAI API

OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

See all of the latest features and updates to the OpenAI API.
255 points by arabicalories 180 days ago developers.openai.com 157 comments
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GPT-5.5 - https://news.ycombinator.com/item?id=47879092 - April 2026 (1010 comments)

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