API sunset calendar

All sunset dates

OpenAI gpt-5.1, gpt-5.3-codex and gpt-5.4-nano: sunset date 2027-04-01

The sunset date for OpenAI gpt-5.1, gpt-5.3-codex and gpt-5.4-nano is 2027-04-01, which is 173 days after 2026-10-10, the date this data was compiled.

Provider
OpenAI
Category
ai-model
Sunset date
2027-04-01 (173 days remaining as of 2026-10-10)
What stops working
Requests to gpt-5.1, gpt-5.3-codex and gpt-5.4-nano fail after the shutdown date.
Replacement
gpt-6-sol (gpt-6-luna for gpt-5.4-nano)

Source

OpenAI API deprecations, developers.openai.com (printed as text, not linked). Read on 2026-10-10. Confirm the date on that page before acting.

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