On June 11, 2026, OpenAI notified developers that early GPT-5 and o3 model snapshots will be deprecated. The affected models will be removed from the API on December 11, 2026, with migration recommended to the newer GPT-5.4 and 5.5 series.
May 8, 2026 · OpenAI API Deprecations
OpenAI Phases Out GPT-5 Snapshots, With API Access Ending August 10, 2026
Multiple GPT-5 model versions are being retired on staggered deadlines. The company points to reliability and simpler model selection, steering users toward gpt-5.5 — but abrupt removals have rattled developers.
Aug 10
2026 — API access ends for gpt-5.2 / gpt-5.3-chat-latest
Jul 23
2026 — earlier snapshots (gpt-5 / 5.1-chat-latest) shut down
<0.1%
usage share of GPT-4o when it was pulled in a past retirement
Notice period: API vs. ChatGPT
Months of advance warning before shutdown (minimum)
~0
ChatGPT (often immediate)
What's being retired — and where to go
gpt-5.2 / gpt-5.3-chat-latest
ends 2026/8/10
→ gpt-5.5
gpt-5-chat-latest, etc.
ends 2026/7/23
→ latest version
GPT-5 Instant / Thinking (ChatGPT)
already / soon
→ auto-migration
Upside
Automatic migration to GPT-5.5 seen as a performance gain
Simpler model selection and improved reliability
Style & quality update shipped for GPT-5.5 Instant (May 28, 2026)
Criticism
GPT-5.2 vanished from ChatGPT's picker ~June 12, despite the Aug 10 docs date
Broken workflows, insufficient notice, unpredictable production impact
Pinned versions for Codex, long-form chat & research hit hardest — high dependency risk
The impact reaches beyond OpenAI — third-party integrations such as GitHub Copilot are deprecating GPT-5 variants in parallel. With benchmarks and pricing largely unpublished, users are urged to migrate to recommended models early .
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