Google has released Gemini 4 Carbon, which it describes as its strongest artificial intelligence (AI) model so far.
The model is available to developers, businesses and paying consumers.
It follows a two-week preview limited to cybersecurity professionals through Google's Fairwind Program.
Carbon sits alongside Gemini 4 Argon, which Google launched last month.
Google said Argon would remain the better choice for most coding and office work.
Built for harder problems
Carbon is designed for more demanding tasks, such as complex coding projects, open-ended scientific research and AI agents that work on jobs for long periods.
Google said its security researchers used the model to confirm two serious flaws in open-source software.
Both were rated critical and have since been fixed.
Teams of agents
The main new feature is a preview of /swarm in Antigravity, Google's platform for building software with AI agents.
It turns a single instruction into a team of agents working together.
Carbon plans and checks the work, while other agents build and test different parts at the same time.
Users can watch the agents' progress as they work.
Google said it tested the tool internally for five weeks.
To show what it can do, the company used it to turn historical photos and engineering drawings into an interactive 3D exhibition about the Eiffel Tower.
Pricing
Carbon costs $2 per million tokens of input and $10 per million tokens of output, the same as Argon.
Tokens are the small chunks of text that AI models process.
The prices will double to $4 and $20 at the end of November.
Even then, Carbon will be cheaper than OpenAI's GPT-6 Astra and Anthropic's Fable 5.2, based on their published prices.
The model can handle up to 1 million tokens at once, roughly the length of several long novels.
It is available through Google's developer tools, its business products, its AI Ultra subscription and GitHub Copilot's higher-priced plans.
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