# clm_BDE4F29684B3

subject: OpenAI (/record/openai.md)  
predicate: feature_added  
value: gpt-4.1-nano  
valid_from: 2025-05-07  
valid_to: null  
published: 2025-05-07  
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  

> May 7 Feature v1/fine-tuning v1/responses v1/chat/completions Launched support for reinforcement fine-tuning . Learn about available fine-tuning methods . gpt-4.1-nano is now available for fine-tuning.

What https://developers.openai.com/api/docs/changelog#2025-05-07 says, word for word.

## Sources

- https://developers.openai.com/api/docs/changelog#2025-05-07 (primary, OpenAI, published 2025-05-07)

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