OpenAI’s developer changelog lists GPT-6.1 Terra on October 26, 2026.
What to know
- Model ID:
gpt-6.1-terra, available in the Responses API and the Chat Completions API. - What OpenAI says it is for: the changelog calls it “a fast, efficient model for visual reasoning, precise computer use, and clear, natural writing.”
- Guidance: OpenAI links a model page and prompting and migration guidance for Terra from the changelog entry.
- Not stated: the changelog entry gives no price, so check OpenAI’s pricing page before you build on it. We have not seen a ChatGPT availability statement for Terra.
Why it matters
Terra sits alongside GPT-6.1 Sol in the GPT-6.1 line. If you build tools that read screenshots or operate software, read OpenAI’s migration guidance and test on your own tasks first. For everyday writing and prompt work, see ChatGPT, our ChatGPT vs Claude comparison and the model tracker. Writing for an agent? Start with our prompt workflow guide.
Source: OpenAI API changelog. We summarise in our own words; check the source for the full details.