2026-06-11: GPT-5 and o3 model deprecations

Takes effect

11 Dec 2026

Published

4 Oct 2026

On June 11, 2026, we notified developers using older GPT-5 and o3 model snapshots of their deprecation and removal from the API on December 11, 2026. Shutdown date Model / system Recommended replacement Dec 11, 2026 gpt-5-2025-08-07 gpt-5.6-sol Dec 11, 2026 gpt-5-mini-2025-08-07 gpt-5.6-terra Dec 11, 2026 gpt-5-nano-2025-08-07 gpt-5.6-luna Dec 11, 2026 gpt-5-pro-2025-10-06 gpt-5.6-sol ( reasoning.mode: pro ) Dec 11, 2026 o3-2025-04-16 gpt-5.6-sol Dec 11, 2026 o3-pro-2025-06-10 gpt-5.6-sol ( reasoning.mode: pro )

Read the vendor's announcement