AI models retired or deprecated in September 2026
· covers September 2026
50 models have a retirement date inside the next four months as of September 2026. Each row is sourced from the provider’s own deprecation notice.
Which AI models are being retired?
| Provider | Model | Shutdown | Replacement |
|---|---|---|---|
| OpenAI | gpt-5.4-cyber | 2026-10-01 | The most capable cyber model available to you. |
| Anthropic | claude-haiku-4-5-20251001 | 2026-10-15 | — |
| OpenAI | gpt-3.5-turbo-0125 | 2026-10-23 | gpt-5.6-terra |
| OpenAI | gpt-4-0613 | 2026-10-23 | gpt-5.6-sol |
| OpenAI | gpt-4-turbo | 2026-10-23 | gpt-5.6-sol |
| OpenAI | gpt-4.1-nano | 2026-10-23 | gpt-5.6-luna |
| OpenAI | gpt-4o-2024-05-13 | 2026-10-23 | gpt-5.6-sol |
| OpenAI | gpt-image-1 | 2026-10-23 | gpt-image-2.5-sunburst or gpt-image-2.5-flare |
| OpenAI | o1-2024-12-17 | 2026-10-23 | gpt-5.6-sol |
| OpenAI | o1-pro-2025-03-19 | 2026-10-23 | gpt-5.6-sol (reasoning.mode: pro) |
| OpenAI | o3-mini-2025-01-31 | 2026-10-23 | gpt-5.6-sol |
| OpenAI | ft-o4-mini-2025-04-16 | 2026-10-23 | gpt-5.6-terra |
| OpenAI | o4-mini-2025-04-16 | 2026-10-23 | gpt-5.6-terra |
| OpenAI | ft-gpt-3.5-turbo | 2026-10-23 | gpt-5.6-terra |
| OpenAI | ft-gpt-4 | 2026-10-23 | gpt-5.6-sol |
| OpenAI | ft-gpt-4.1-nano-2025-04-14 | 2026-10-23 | gpt-5.6-luna |
| OpenAI | ft-babbage-002 | 2026-10-23 | gpt-5.6-terra |
| OpenAI | ft-davinci-002 | 2026-10-23 | gpt-5.6-terra |
| OpenAI | gpt-3.5-turbo | 2026-10-23 | gpt-5.6-terra |
| OpenAI | gpt-3.5-turbo-completions | 2026-10-23 | gpt-5.6-terra |
| OpenAI | gpt-4 | 2026-10-23 | gpt-5.6-sol |
| OpenAI | gpt-4-0613-completions | 2026-10-23 | gpt-5.6-sol |
| OpenAI | gpt-4-completions | 2026-10-23 | gpt-5.6-sol |
| OpenAI | gpt-4-turbo-2024-04-09 | 2026-10-23 | gpt-5.6-sol |
| OpenAI | gpt-4-turbo-completions | 2026-10-23 | gpt-5.6-sol |
Per-provider migration detail: the deprecation calendar, which also shows our measured latency for the provider you would be migrating to.
Same series: ← August 2026
Other measurements from the same period
- Which AI API SDKs developers installed in September 2026
- AI API outages in September 2026: who went down, and who admitted it
- Who changed AI API prices in September 2026
This post is a snapshot. The live figures behind it: / · all posts