Google opens Gemini 4 Carbon to the public and brings its strongest model to AI Mode in Search

Google began rolling out Gemini 4 Carbon, its latest AI model, to the public on November 10. Two weeks earlier, the model had gone to a small group of cyber defense professionals. The company calls it its strongest model yet and says it competes with the best systems from Anthropic and OpenAI.

According to The Verge, in a story published on November 10, Google said in a blog post that Carbon is available through the Gemini API in Google AI Studio and through Gemini for business, for all paying developers and businesses. Google AI Ultra subscribers also get the model in the Gemini app, in AI Mode in Google Search and in Antigravity. It is still unclear when, or whether, Carbon will reach cheaper plans and free users.

Carbon and Argon

Google says Carbon "pushes the frontier even further" than Argon, the company's other top model, launched last month. According to Google, Argon should remain "the ideal choice for most software engineering and knowledge work." Carbon, on the other hand, was "built for tasks that test the limits of a model's intelligence," such as complex multistep coding and open-ended scientific research.

To show what Carbon can do on long-running work with AI agents, Google also released a preview of a feature called swarm in Antigravity, its agentic development platform. The feature turns a single prompt "into a coordinated team of agents."

Pricing and performance

Launch pricing is $2 per million input tokens and $10 per million output tokens. That works out to roughly a fifth of the cost of OpenAI's GPT-6 Astra and a quarter of the cost of Anthropic's Fable 5.2, which launched a day earlier. Prices double at the end of November, when the promotional period ends, and even then Carbon remains much cheaper per token than its frontier rivals. That does not necessarily mean a lower bill, because each model can use a different number of tokens on the same task.

The benchmarks Google shared in the announcement put the model among the strongest on the market on most metrics, behind only Fable 5.2. The Verge notes that companies tend to pick the results that show their tools in the best light. In the outlet's view, a launch this close to Argon marks Google's return to the front line of AI research, after months in which the race seemed limited to Anthropic and OpenAI.

What changes for brands

For anyone managing a brand, the most direct takeaway is Carbon's arrival in AI Mode in Google Search, for now only for Google AI Ultra subscribers. That audience now gets Google's strongest model inside Search, and there is no announced date for everyone else.