# clm_E0A6845926A9

subject: Cursor (/record/cursor.md)  
predicate: adopted  
value: [GPT-5.1-Codex-Max](/record/gpt-5-1-codex-max.md)  
valid_from: 2025-12-04  
valid_to: null  
published: 2025-12-04  
recorded: 2026-10-29  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-10-31  
cite: AsOf. "Cursor adopted: GPT-5.1-Codex-Max", as of 2025-12-04. Claim clm_E0A6845926A9, https://asof.is/claim/clm_E0A6845926A9, accessed 2026-11-09. Source: https://cursor.com/blog/codex-model-harness.  
checked: 2026-10-31 · its source page states the value and the date  

> This post will cover how we’ve updated our agent harness to support their latest frontier coding model GPT-5.1-Codex-Max .

What https://cursor.com/blog/codex-model-harness says, word for word.

## Sources

- https://cursor.com/blog/codex-model-harness (primary, Cursor, published 2025-12-04)

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