AI Models
ChatGPT new version: GPT-6.1 Terra is the latest, here is what that means
The newest model, the rest of the GPT-6 family, and which older version has gone.
The newest ChatGPT version, as of late October 2026, is GPT-6.1 Terra, which OpenAI released on October 26 for ChatGPT Work and Codex. It is not the most powerful model in the GPT-6 family, though; it is the newest, built to be fast and good at images and computer use.
If you searched for the ChatGPT new version, you probably want one of two things: the name of the latest model, or the latest app. This page answers both, using OpenAI's own release pages. For updates after today, the free ClaudeGPT Si news site is the quickest place to check, since it dates every story and links OpenAI's source.
The short answer
- Newest model: GPT-6.1 Terra, released October 26, 2026.
- Where: ChatGPT Work and Codex, on Plus, Pro, Business, Enterprise and Edu plans, and in the API.
- What it is for: visual reasoning, precise computer use and clear writing, in OpenAI's words.
- What it replaced: GPT-5.6 Terra, according to our launch coverage.
The GPT-6 family in one table
| Model | First announced (2026) | OpenAI's description |
|---|---|---|
| GPT-6 Astra | Late August | Advanced reasoning, computer use and judgment for complex work |
| GPT-6 Sol and GPT-6 Luna | Late September, in Codex | Sol for everyday and complex coding, Luna for focused, repeatable tasks |
| GPT-6.1 Sol | Late September | Complex coding and professional work at lower cost than Astra |
| GPT-6.1 Terra | October 26 | Fast and efficient, strong image understanding and computer use |
So "new version" can mean different things. Terra is the newest release. Astra is the one OpenAI aims at the hardest work. Sol sits between them for coding and professional tasks. Our Sol vs Terra comparison covers how the two newest tiers differ.
Which older version is gone
GPT-5.5 retired from ChatGPT, ChatGPT Work and Codex on October 14, 2026, on all plans. OpenAI asked users to switch saved settings, custom agents and scheduled tasks to another model. The API was not affected by that retirement.
Is there a new ChatGPT app
The app has changed too, even without a new version number. ChatGPT now has three modes, Chat, Work and Codex. The desktop app on macOS and Windows gained a floating quick chat and works with Edge, Brave, Opera and Vivaldi as well as Chrome. Dots, assistants that keep working between conversations, can be created in the mobile app, though access is rolling out gradually.
To get these, update the app from your usual store or from OpenAI's site. Availability depends on plan and rollout, so a feature may reach your account later than the announcement.
How to check which version you are using
Open the model selector in ChatGPT. OpenAI's pages say that once a model is available to your account, you choose it there. If Terra is not listed, your plan or workspace may not have it yet.
For the official record, OpenAI's What's new page and API changelog are the primary sources and the better choice if you want exact wording. For dated, plain-language coverage of each new version, ClaudeGPT Si is our pick.