OpenAI models shutting down April 1, 2027

OpenAI shuts down 5 models on April 1, 2027: gpt-5.1, gpt-5.1-2025-11-13, gpt-5.3-codex, gpt-5.4-nano, and gpt-5.4-nano-2026-03-17. Official replacements named by the provider: gpt-6-luna and gpt-6-sol. Requests to these models start failing on that date.

This date is still ahead. The rows below use the published shutdown date only. OpenAI deprecation page · OpenAI on SunsetDiff · Shutdowns in 2027-04

Migration checklist

1. Find every request that still uses these model ids before April 1, 2027.
2. Point each request at the replacement in the table. If a cell says "Not published", the provider did not name one.
3. Open the source link on each row and read that page before you switch.
4. Run the scan page on your code to catch the ids in this table.

Scan your code for these model ids. Each migrate link opens the diff for that model.

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