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ChangelogOpenAI
- Severity
- High
- Published
- 3 days agoApr 23, 2026
- Signal
- 63
GPT-5.5 and Codex app updates
Official source entry
GPT-5.5 and Codex app updates
From Codex Changelog. The simplified record can be checked against the original wording.
Why it matters
OpenAI updated codex 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