OpenAI GPT-5.x and GPT-6 family (as of 2026-09-30)
Hub for OpenAI frontier models. OpenAI’s models page now lists only the GPT-6 lineup as current.
| Model | API ID | Released | Note |
|---|---|---|---|
| gpt-6-dot-astra | gpt-6-astra | 2026-09-03 | top tier |
| gpt-6-dot-1-sol | gpt-6.1-sol | 2026-09-29 | near-Astra, newest |
| gpt-6-dot-sol | gpt-6-sol | 2026-09-22 | superseded by 6.1 |
| gpt-6-dot-luna | gpt-6-luna | 2026-09-22 | efficiency tier |
All: 1.05M context, 128K output, text+image in, text out.
GPT-5.x history (API changelog)
- GPT-5.3 Codex: 2026-02-24 (API) - see gpt-5-dot-3-codex
- GPT-5.4 (+Pro): 2026-03-05; 5.4 Mini/Nano: 2026-03-17
- GPT-5.5: 2026-04-24
- GPT-5.6 Sol / Terra / Luna: 2026-07-09 (GPT-5.6 Sol shown as “current” at promotional pricing through 2026-11-21)
Retirements (OpenAI deprecations page)
Verified on OpenAI’s deprecations page (https://developers.openai.com/api/docs/deprecations, re-fetched 2026-10-01): gpt-5-codex, gpt-5.1-codex (incl. -max and -mini) and gpt-5.2-codex shut down 2026-07-23 (replacement gpt-5.6-sol); codex-mini-latest 2026-02-12; o4-mini 2026-10-23 (replacement gpt-5.6-terra); o3 / o3-pro 2026-12-11; sora-2 models 2026-09-24. gpt-5.3-codex is not listed in any deprecation entry (an earlier version of this note wrongly said it shut down 2026-07-23). gpt-4, gpt-4-turbo, gpt-3.5-turbo-0125, gpt-4.1-nano: 2026-10-23 (earlier fetch). chatgpt-4o-latest: 2026-02-17. No deprecation entries were found for GPT-4o, GPT-4.1 or 5.4-5.6. See openai-4o, gpt-4-dot-1, gpt-3-dot-5.
Other OpenAI releases in 2026
gpt-oss open-weight family (8B/20B/120B-class, 2026-06-09 per a search summary - unverified; the 2025 release is confirmed); GPT Image 2.5 (2026-09-08); GPT-Live 1 voice (2026-09-10).
Sources
- https://developers.openai.com/api/docs/models (2026-09-30)
- https://developers.openai.com/api/docs/changelog (2026-09-30)
- https://developers.openai.com/api/docs/deprecations (2026-09-30)
- https://developers.openai.com/api/docs/models/gpt-5.6-sol (2026-09-30)