# clm_5FA8B270B1C9

subject: OpenAI (/record/openai.md)  
predicate: model_release  
value: GPT-5.3-Codex  
valid_from: 2026-02-05  
valid_to: null  
published: 2026-02-05  
recorded: 2026-11-02  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-03  
checked: 2026-11-02 · its source page states the value and the date (its publisher's feed entry for the page)  

> Introducing GPT-5.3-Codex. GPT-5.3-Codex is a Codex-native agent that pairs frontier coding performance with general reasoning to support long-horizon, real-world technical work

What https://openai.com/index/introducing-gpt-5-3-codex says, word for word.

## Sources

- https://openai.com/index/introducing-gpt-5-3-codex (primary, OpenAI, published 2026-02-05)
- https://openai.com/index/gpt-5-3-codex-system-card (primary, OpenAI, published 2026-02-05)

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