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DocsOpenAI
- Severity
- High
- Published
- 2 days agoApr 24, 2026
- Signal
- 56
Released GPT-5.5, a new frontier model for complex professional work, to the Chat Completions and Responses API, and released GPT-5.5 pro for Responses API req…
Released GPT-5.5, a new frontier model for complex professional work, to the Chat Completions and Responses API, and released GPT-5.5 pro for Responses API requests for tougher problems that benefit from more compute. G…
Official source entry
Released GPT-5.5, a new frontier model for complex professional work, to the Chat Completions and Responses API, and released GPT-5.5 pro for Responses API req…
From API Changelog. The simplified record can be checked against the original wording.
Why it matters
OpenAI updated api changelog semantics for llms and agents. Review the official entry during the next release review.
Who should care
- backend
- ai
Affected stack
- llms
- agents
- developer-workflow
Categories
modelapi