GPT-4.1 · model releasegpt-4.1

Valid from

2025-04-14

Valid until

still holds

Published

2025-04-14

Recorded by AsOf

2026-11-04

Checked

2026-11-04 · its source page states the value and the date

Confidence

0.95

Sources

“Apr 14 Feature gpt-4.1 gpt-4.1-mini gpt-4.1-nano v1/responses v1/chat/completions v1/fine_tuning Added gpt-4.1 , gpt-4.1-mini , and gpt-4.1-nano models to the API.”— what the page says, read 2026-11-04

• OpenAI API changelog, April 14, 2025primary · developers.openai.com · 2025-04-14

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