Gemini 4 Carbon opens to every paying developer at $2 input · $10 output
Google made Gemini 4 Carbon generally available on November 10, at Argon's introductory price until November 30 and $4 input · $20 output per 1M tokens after.
What shipped
Google opened Gemini 4 Carbon to all paying Gemini API developers and enterprises on November 10, 2026, two weeks after a limited release to cyber defenders in the Fairwind Program. The API model ID is gemini-4-carbon.
Price
Carbon matches Gemini 4 Argon at an introductory $2 per 1M input tokens and $10 per 1M output tokens. From December 1 the list price doubles to $4 input and $20 output.
Context
Carbon shares Argon's unified context window of 1,048,576 tokens covering input, thinking and output. Default synchronous output is capped at 65,536 tokens, and long decode can extend output up to the full window.
What Google reports
Google says Carbon ranks first on CursorBench 4.0, Perplexity's WANDR and Zapier's AutomationBench, and second on the new Multimodal Knowledge Agent benchmark from Artificial Analysis. These are vendor claims. BenchGecko will add independent results as they appear.
Availability
Google lists Carbon in Google AI Studio and Gemini for business through the Gemini API for paying developers and enterprises. It is also rolling out to Google AI Ultra subscribers in Google Antigravity, the Gemini app and AI Mode in Search. Carbon for cyber work remains available through the Fairwind Program. Google Cloud lists the same $2 input and $10 output rates globally through November 30, then $4 and $20 from December 1.
On BenchGecko
The Gemini 4 Carbon page now shows the 1,048,576 token context window, the 65,536 token default output and the introductory price. BenchGecko will show the December 1 price change when it takes effect.
Source: BenchGecko
Written automatically from BenchGecko's tracked data for this period; every number comes from the changelog, model, mindshare and pricing datasets. Checked against the source data before publishing.