Breaking model

OpenAI will remove the older GPT-5 and o3 snapshots (gpt-5-2025-08-07, gpt-5-mini/nano-2025-08-07, gpt-5-pro-2025-10-06, o3-2025-04-16, o3-pro-2025-06-10) on December 11, 2026.

Takes effect Dec 11, 2026 · models gpt-5-2025-08-07, gpt-5-mini-2025-08-07, gpt-5-nano-2025-08-07, gpt-5-pro-2025-10-06, o3-2025-04-16, o3-pro-2025-06-10

Reviewed against the vendor source on Sep 24, 2026 (AI-assisted review). Key facts are re-checked against the source daily.

What changes

Announced June 11, 2026. Replacements: gpt-5-2025-08-07 and o3-2025-04-16 go to gpt-5.6-sol, gpt-5-mini-2025-08-07 to gpt-5.6-terra, gpt-5-nano-2025-08-07 to gpt-5.6-luna, and gpt-5-pro-2025-10-06 and o3-pro-2025-06-10 to gpt-5.6-sol with reasoning.mode: pro. The page lists only these dated snapshots, not the undated aliases.

Breaking: Calls fail after this date.

What to do

Replace each pinned snapshot with its listed replacement: gpt-5.6-sol, gpt-5.6-terra or gpt-5.6-luna. For gpt-5-pro and o3-pro, use gpt-5.6-sol with reasoning.mode set to pro. Re-run your evals before switching.

Strings to search for

gpt-5-2025-08-07gpt-5-mini-2025-08-07gpt-5-nano-2025-08-07gpt-5-pro-2025-10-06o3-2025-04-16o3-pro-2025-06-10

Source

https://developers.openai.com/api/docs/deprecations