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Google opened Gemini 4 Argon to paid API developers and set temporary pricing for input and output tokens

Deployment Provisional 78% confidence first seen

Two coverage pieces describe Google’s Gemini 4 Argon being made available to paid API developers following its early-access opening on October 13, along with a discounted token pricing period through November 30. Reviews of Argon’s performance suggest it can reduce cost compared with Anthropic’s Claude Opus 5.5 but may show reliability limitations on certain accuracy and long-context evaluations.

Anthropic Argon (Gemini 4) Claude Opus 5.5 Gemini 4 Gemini 4 Argon Google Android CI (continuous integration) Go Playwright RocketFlag UI The New Stack

Source coverage

Gemini 4 Argon vs. Claude Opus 5.5: Half the price and about half as accurate The New Stack Gemini 4: Argon, Early Access Review JKu2019s Blog newsletter

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