WhichBot › What replaced it › What replaced o4-mini?
Last checked Oct 28, 2026 · plain English · no paid picks
What replaced o4-mini?
Short answer: OpenAI named GPT-5.6 Terra. o4-mini shut down on Oct 23, 2026. The newest Terra model in our directory is GPT-6.1 Terra, released Oct 26, 2026.
What to do: Developers: move to a current model. OpenAI suggests comparing GPT-6.1 Terra with GPT-5.6 Terra when you migrate.
The facts
| Old | o4-mini |
|---|---|
| Status | Retired. Developer service shut down Oct 23, 2026 (OpenAI moved it to Past retirement list) |
| Replaced by | GPT-5.6 Terra |
| Official source | platform.openai.com |
| Last checked | Oct 28, 2026 |
Current options at a glance
| GPT-6.1 Terra | |
|---|---|
| What it is | OpenAI's fast, efficient model |
| Made by | OpenAI |
| Price | Developer price: $1 in and $5 out per million tokens |
| Good at | OpenAI calls it fast and efficient; standard developer service price $1 in / $5 out per 1M tokens, half of GPT-6.1 Sol; Best for: visual reasoning, computer use, clear writing, high-volume work; Reads up to 1,050,000 tokens at once; Reads: text, image |
| Watch out for | Tool calling needs the Responses developer service; no audio/video input |
| Where it runs | ChatGPT Work and Codex (Plus/Pro/Business/Enterprise/Edu) |
| Status | Current. Released Oct 26, 2026 in the developer service and in ChatGPT Work and Codex (Plus, Pro, Business, Enterprise, Edu); not listed for the regular Chat tab. OpenAI suggests comparing it with GPT-5.6 Terra when migrating. |
| Sources | developers.openai.com · help.openai.com · platform.openai.com · platform.openai.com (2) · models.dev |
Related pages
- What replaces GPT-4o?
- What replaces GPT-4.1?
- What replaced GPT-4 Turbo?
- What replaces o3?
- What replaced GPT-5.5?
- What replaces GPT-5.1?
Questions people ask
What replaced o4-mini?
OpenAI named GPT-5.6 Terra. o4-mini shut down on Oct 23, 2026. The newest Terra model in our directory is GPT-6.1 Terra, released Oct 26, 2026.
What should I do if I used o4-mini?
Developers: move to a current model. OpenAI suggests comparing GPT-6.1 Terra with GPT-5.6 Terra when you migrate.
Does o4-mini still work?
Retired. Developer service shut down Oct 23, 2026 (OpenAI moved it to Past retirement list)
Facts come from the companies' own pages, linked above, and were last checked Oct 28, 2026. Prices are US and can change. Picks are Hector's: no paid picks, sponsors always labeled, and no sponsorship from AI labs. Our policy.