GPT-6.1 Sol
OpenAI's value flagship. On the independent index it lands two points behind GPT-6 Astra at about a fifth of the cost per task.
OpenAI, reasoning. Checked 30 October 2026.
Where to use it through an API
- OpenAI
gpt-6.1-sol - Vercel AI Gateway
openai/gpt-6.1-sol
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 |
|---|---|---|---|
| Gemini 4 Carbon | 59 | n/a | n/a |
| Claude Opus 5.5 | 58 | 1M | 97/s |
| 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 |
Use GPT-6.1 Sol with every other AI at once
Put GPT-6.1 Sol 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 Sol API?
Not that we found. GPT-6.1 Sol is paid per token through OpenAI and Vercel AI Gateway.
What is the GPT-6.1 Sol model id?
OpenAI: gpt-6.1-sol; Vercel AI Gateway: openai/gpt-6.1-sol.
How does GPT-6.1 Sol score?
55 on the Artificial Analysis Intelligence Index at its max setting, checked 30 October 2026.
Can I use GPT-6.1 Sol with ChatGPT, Claude and Gemini at the same time?
Yes. MultiScreenAI puts GPT-6.1 Sol in one panel and other models in the others, sends one message to all of them and shows the answers side by side.