ft-gpt-4.1-nano-2025-04-14

ft-gpt-4.1-nano-2025-04-14 (OpenAI) was shut down on Oct 23, 2026; calls to it fail. OpenAI recommends gpt-5.6-luna instead.

Provider

OpenAI

Shutdown

Oct 23, 2026 (already shut down)

Announced

Apr 22, 2026

Replace with

gpt-5.6-luna

• Fine-tuned models built on this base (IDs like 'ft:gpt-4.1-nano-2025-04-14:org::id'). OpenAI writes them as 'ft-gpt-4.1-nano-2025-04-14'.
• Listed under 'Upcoming deprecations' on the page although the shutdown date is today/past.

Source: https://developers.openai.com/api/docs/deprecations · report a wrong date