GPT-6.1 Terra
OpenAI's fast, efficient GPT-6.1 model. It scores 51 at its max setting, close to the flagships, and writes faster than Sol or Astra.
OpenAI, reasoning. Checked 30 October 2026.
Where to use it through an API
- OpenAI
gpt-6.1-terra - Vercel AI Gateway
openai/gpt-6.1-terra
The maker publishes its own benchmarks and limits on its model page.
How it compares
The models just above and below it on the Artificial Analysis Intelligence Index.
| Model | Index | Context | Speed |
|---|---|---|---|
| GPT-6 Astra | 57 | 1M | 76/s |
| GPT-6.1 Sol | 55 | 1M | 79/s |
| Claude Sonnet 5.5 | 54 | 1M | 138/s |
| GPT-6.1 Terra | 51 | 1M | 91/s |
| Claude Fable 5.1 | 50 | 1M | 64/s |
| Gemini 4 Argon | 50 | 1M | 83/s |
| Kimi K3.1 Pro | 46 | 1M | 35/s |
Use GPT-6.1 Terra with every other AI at once
Put GPT-6.1 Terra in one panel and ChatGPT, Claude, Gemini or any of 300+ models in the others. One message goes to all of them, answers arrive side by side, and test mode times them and hides the names so you judge fairly. Pro is free with a follow on X, and you use your own keys.
Questions
Is there a free GPT-6.1 Terra API?
Not that we found. GPT-6.1 Terra is paid per token through OpenAI and Vercel AI Gateway.
What is the GPT-6.1 Terra model id?
OpenAI: gpt-6.1-terra; Vercel AI Gateway: openai/gpt-6.1-terra.
How does GPT-6.1 Terra score?
51 on the Artificial Analysis Intelligence Index at its max setting, checked 30 October 2026.
Can I use GPT-6.1 Terra with ChatGPT, Claude and Gemini at the same time?
Yes. MultiScreenAI puts GPT-6.1 Terra in one panel and other models in the others, sends one message to all of them and shows the answers side by side.