o3 changelog

Every change to o3 that Modelpeers has recorded, newest first, each with the source it came from. The record starts Jun 11, 2026.

All (1)Retiring (1)

June 2026

GPT-5, GPT-5 mini, GPT-5 nano

6 models from OpenAI

RetiringJun 11, 2026

GPT-5 and o3 snapshots to shut down December 11

The August 2025 GPT-5, GPT-5 mini, GPT-5 nano, GPT-5 Pro, o3 and o3-pro snapshots will be removed on December 11, 2026, with GPT-5.6 Sol, Terra or Luna as replacements.

Takes effect Dec 11, 2026 · in 40 days

Who is affected:: Apps pinned to GPT-5 or o3 snapshots.
Action needed:: Migrate to the listed GPT-5.6 replacement before December 11, 2026.

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