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September 30, 2026·Source

Gemini 4 Argon

Google's new frontier model for long, multi-step work. Today it is limited to a small group of security teams, with paid API customers and AI Ultra subscribers next.

Details

  • Can write up to 1 million tokens in a single response, up from 64,000, so it can produce very long documents or code in one pass
  • Takes text, images, and video as input and returns text, code, or structured responses
  • Today it is limited to vetted cybersecurity teams in Google's Fairwind Program, plus pre-release testing with the U.S. government
  • Paid Gemini API customers and Google AI Ultra subscribers are next in line, with no date given beyond 'as soon as possible'
  • Introductory API price is $2 per million input tokens and $10 per million output tokens, rising later to $4 and $20, with a 95% discount on cached input

Best for

Long, multi-step work like large codebases, legal and finance analysis, and reports that run far longer than a normal response.

When to use it

Once it reaches the API or AI Ultra, try it on tasks where current Gemini models lose the thread partway through or cut off long outputs.

Who benefits

Developers on paid Gemini API plans and Google AI Ultra subscribers. Most marketing teams will wait for the wider rollout.

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