Gemini 4 Carbon
Google's newest and strongest Gemini, announced on 28 October 2026 and the leader of the independent index at 59. Google is rolling it out in stages, starting with security partners.
Google, reasoning. Checked 30 October 2026.
Where to use it through an API
Not on the public Gemini API yet. Google first gives it to a small group of security partners and has not published a model id or a date for everyone else. It joins the app when Google opens the API.
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 |
Use Gemini 4 Carbon with every other AI at once
Put Gemini 4 Carbon 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 Gemini 4 Carbon API?
Not on the public Gemini API yet. Google first gives it to a small group of security partners and has not published a model id or a date for everyone else. It joins the app when Google opens the API.
What is the Gemini 4 Carbon model id?
Google has not published one yet.
How does Gemini 4 Carbon score?
59 on the Artificial Analysis Intelligence Index, checked 30 October 2026.
Can I use Gemini 4 Carbon with ChatGPT, Claude and Gemini at the same time?
Yes. MultiScreenAI puts Gemini 4 Carbon in one panel and other models in the others, sends one message to all of them and shows the answers side by side.