API Change Watch
EN中文
Menu
Get alerts
Primary official sources. Traceable record by record.Provider docs, changelogs and official announcements only
12primary source pages30verified eventsSep 1, 2026 – Sep 10, 2026 (UTC)
Inspect source registry
Public preview · automatic monitoring and email alerts are not enabled

UTC 2026-09-10 build snapshot, not live metrics. Date states can update; source verification timestamps do not.

Home/Events/OpenAI
OpenAI

Older GPT-5 and o3 snapshots scheduled for shutdown

OpenAI lists Dec 11, 2026 as the shutdown date for older GPT-5 and o3 snapshots.

CriticalModel DeprecationVerifiedOfficial Announcement
92d leftDec 11, 2026

Verification is under 30 days old, not a live check; date passage does not confirm shutdown.

What changed

Impact summary

OpenAI lists Dec 11, 2026 as the shutdown date for older GPT-5 and o3 snapshots.

BeforeOlder GPT-5 and o3 dated snapshots
After / replacementgpt-5.6-sol / gpt-5.6-terra / gpt-5.6-luna (reasoning.mode: pro where applicable)

Affected models and systems

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

Migration action

Recommended next step: Replace each listed GPT-5/o3 snapshot with the matching GPT-5.6 substitute. For pro-tier workloads, set reasoning.mode: pro on gpt-5.6-sol and re-run evals before Dec 11, 2026.

Source and interpretation

API platform & regional scope

OpenAI direct API · Direct developer platform; eligibility and regional restrictions are account-specific.

Not Azure OpenAI.

Bounded manual catalog. Original event checks retained from 2026-09-01; not reverified in this expansion.

Unconfirmed regions are not assumed to be global. Automatic monitoring is OFF. Source checks

Official evidence locators

Announcement 2026-06-11; shutdown Dec 11, 2026. Original source date and qualifier retained; exact shutdown time is not inferred.

Affected endpoints: Not separately specified; check model / capability scope

Action / deadline: Review required · Stated deadline

This record is classified as official announcement. The facts above were normalized from the provider's public developer documentation. API Change Watch does not treat an unreviewed page diff as a verified announcement.

Record revision history

  • · addition · 0bdf1b656c71

Full before/after values are retained in the JSON export. Recording time is not announcement or verification time.

Read the official source ↗