Model retirement dates / OpenAI
gpt-5.3-codex
OpenAI will retire gpt-5.3-codex on 1 April 2027. After that date, API calls to it fail. The recommended replacement is gpt-6-sol.
| Provider | OpenAI |
|---|---|
| Status | Retiring (as of 11 Nov 2026) |
| Shutdown | 1 April 2027 |
| Replacement | gpt-6-sol |
| Model type | Text |
| Announced | 1 October 2026 |
| Source | OpenAI deprecations page |
Before you switch
A replacement model answers the same prompt differently: tone, length, format, and whether JSON still parses. Driftline Pro runs your real prompts on gpt-5.3-codex and gpt-6-sol side by side in CI and shows what changed. See a drift test.
Check your code for it
Run this in your repository. No install and no API key; it lists every OpenAI, Anthropic and Google model ID it finds, with its retirement date and replacement:
npx -y @aidriftline/driftline .Or look for this ID only: grep -rn "gpt-5.3-codex" . (misses aliases, Bedrock and Vertex names, and IDs split across lines).
To be warned automatically before the next retirement, add the free Driftline GitHub Action. It annotates the exact line in pull requests and can fail the build on retired models.
Same date at OpenAI
gpt-5.1 gpt-5.1-2025-11-13 gpt-5.4-nano gpt-5.4-nano-2026-03-17
Checked against OpenAI's official page on 11 November 2026. Something wrong? hello@aidriftline.com