Gemini 4 Carbon reaches paid developers and AI Mode for Ultra

For now Google charges $2 for every million tokens sent in and $10 for every million it writes back (a token is a chunk of a word, the unit AI models bill by), and those prices double at the end of November, The Verge notes. Google pitches Carbon at multi-step coding and open-ended scientific research, and still recommends Argon, its other top model, for most programming and office work. Argon costs the same per token, but Carbon works through more tokens on each job, so its total bill is likely to run higher, The Decoder points out.

Carbon has reached Search too. Google’s Robby Stein said it is now shipping in AI Mode, the chat-style search, for Google AI Ultra subscribers, Search Engine Roundtable reports. Alongside the model, Google is previewing a swarm feature in its Antigravity coding tool that splits one prompt across a team of agents.

On our price sheet, checked on 10 November, Google AI Pro costs $19.99 a month and Google AI Ultra $99.99 or $199.99.

Carbon’s answers in AI Mode go only to the $99.99-and-up Ultra tier, so the AI Mode answers that most searchers, and the brands named in them, see this week come from other Gemini models.