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On October 28, 2026 Google announced Gemini 4 Carbon, its strongest model to date. Developers can’t get it through the API yet: cybersecurity specialists get access first. Here is what is known as of October 29, when to expect open access, and what to use until then. In short
  • What it is. Google’s new flagship model. Google says it is especially strong at cybersecurity and at long, multi-step tasks the model carries out on its own.
  • Available now? No. A subset of cyber defenders gets it first, then other trusted Google partners (the Fairwind Program). Google promises access for developers, businesses and consumers “soon” but gives no date.
  • Google’s price. $2 per million input tokens and $10 per million output tokens at launch, later $4 and $20.
  • What to do now. The previous model, Gemini 4 Argon, is already available on RuAPI, from Russia without a VPN. We plan to add Carbon as soon as Google opens the API to developers, and we’ll announce it in our Telegram channel.

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What Google announced

Koray Kavukcuoglu (Chief AI Architect at Google) introduced the model on the Google blog on October 28, two weeks after Gemini 4 Argon. Highlights:
  • Ranking. 59 points on the independent Artificial Analysis Intelligence Index (v5.0), first place.
  • Cybersecurity. Finding vulnerabilities (SEC-bench Pro) 88.2%, exploitation (ExploitGym) 54.8%, patching (CWE-bench) 71.0%. Google notes these evaluations were run without the model’s safeguards.
  • Web development. 4th place on WebDev Arena (1768 Elo, up 89 points).
  • Long tasks. Google says internal teams saw the model work on complex multi-step tasks for days and persist through dead ends. These are Google’s own observations and haven’t been independently verified.
Google’s announcement doesn’t compare Carbon with Claude Opus 5.5 or OpenAI models by name. There is one comparison with an unnamed “other lab’s” frontier model: the Chrome team reports Carbon is more than 10x better at high-quality patch generation. The first place is the Artificial Analysis composite index, not head-to-head tests against specific models.

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When will the Gemini 4 Carbon API be released

Google is rolling the model out in stages:
  1. From the week of the announcement: a subset of cyber defenders.
  2. Next: gradually more trusted partners through the Fairwind Program.
  3. Then: developers, businesses and consumers. Google says “as soon as possible” but gives no date.
As of October 29, Carbon is not in the official Gemini API model list, and Google hasn’t published an API model ID (such as gemini-4-carbon).
If a service is already selling a “Gemini 4 Carbon API”, ask where it gets the model: Google has no open developer access yet. A different model may be answering under the famous name. More on these risks in Why some sell AI APIs at 5% of the official price.

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How Carbon differs from Argon

According to Google, compared with Argon, Carbon:
  • generates secure code more than 2x as often (Google internal benchmarks);
  • makes roughly half as many unsupported claims;
  • had 0% successful prompt-injection attacks (Gray Swan benchmark) versus 0.7% for Argon.
Both models use the same safety stack.

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What to use now: Gemini 4 Argon

While Carbon is closed, the nearest available Google model is gemini-4-argon. On RuAPI it works from Russia without a VPN or a foreign card, and you can top up in USDT. RuAPI prices per 1M tokens, as on the pricing page (as of October 29, 2026; your account’s price may be lower): Google doubles Argon’s price on December 1 and we will follow. Context is about 1.05M tokens (input and output combined), up to 65,536 tokens per response, and the model understands images.
More about the lineup and the native Gemini format on the Gemini API page. Connecting from Russia from scratch: How to get the Gemini API in Russia. gemini-4-argon unlocks after a top-up of $5 or more, in USDT or with a foreign bank card. No USDT? Buy it with rubles.

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How to hear about the Carbon launch

We follow Gemini API updates. As soon as Google opens Carbon to developers, we plan to add it and will announce it right away:

Sign up and try Gemini 4 Argon

Sign up with email, Google or Yandex. No VPN or foreign card needed.

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FAQ

When will the Gemini 4 Carbon API be released? Can I call it now? Not yet, and Google hasn’t given a date. As of October 29, 2026 Google has given access only to a subset of cyber defenders and Fairwind partners. The model isn’t in the Gemini API for developers yet. When will Gemini 4 Carbon be on RuAPI? When Google opens it to developers. Google hasn’t given a date. We’ll post in our Telegram channel as soon as it’s available here. How much will Gemini 4 Carbon cost? Google’s launch price is $2 per million input tokens and $10 per million output tokens, then $4 and $20. We’ll publish RuAPI’s price when we add it. What should I use until Carbon is available? gemini-4-argon, Google’s previous flagship with the same launch price. It’s already available on RuAPI from Russia without a VPN. Is this the same as Gemini 4 Argon Cyber Permissive? No. Argon Cyber Permissive is a special version of Argon for vetted cybersecurity organizations, also available only through the Fairwind Program. Carbon is a separate, newer model.