# clm_3C9D776B3539

subject: GPT-5.3-Codex (/record/gpt-5-3-codex.md)  
predicate: deprecated  
value: gpt-5.3-codex  
valid_from: 2026-10-01  
valid_to: null  
published: no source on record carries a date  
recorded: 2026-11-04  
confidence: 0.95  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-04  
checked: 2026-11-04 · its source page states the value and the date  

> 2026-10-01: GPT-5.3-Codex, GPT-5.1, GPT-5.4-Nano The following models are deprecated and will be removed from the API on April 1, 2027, with six months’ notice. Migrate to the recommended replacements before the shutdown date. Shutdown date Model / system Recommended replacement Apr 1, 2027 gpt-5.3-codex gpt-6-sol

What https://platform.openai.com/docs/deprecations says, word for word.

## Sources

- https://platform.openai.com/docs/deprecations (primary, OpenAI (API deprecations))

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