Google launches Gemini 4 Argon worldwide as its new flagship AI model
Google is rolling out Gemini 4 Argon worldwide as its new flagship model, replacing the Gemini Pro class. Developers can access it through AI Studio and the Gemini API, while AI Ultra and Pro subscribers receive access through the Gemini app and Google Search’s AI mode; Antigravity access is limited to AI Ultra. Free and Plus users remain on weaker Flash models. Introductory API pricing is $2 per million input tokens and $10 per million output tokens, with cached input priced 95% lower.
Argon leads the Vals Index but trails Anthropic’s Claude Opus 5.5 and Meta’s Muse Wonder Full in other independent overall rankings. Google’s self-reported results emphasize software development: agent-driven code submissions rose by more than 35%, rollbacks fell by nearly a third, and a Chromium refactor spanning hundreds of files in a 40-million-line codebase was completed in weeks rather than months. Other reported optimizations cut session preparation by 40%, improved cold imports by 21%, and increased Gemma inference on an A100 via vLLM from about 37,900 to more than 108,000 tokens per second.
Google also highlights browser-based 3D, game and animation generation, alongside stronger safeguards. Argon recorded a 0.7% successful attack rate on Gray Swan’s indirect prompt-injection benchmark, although the article notes that direct comparison with earlier tests is uncertain. Google is offering Antigravity’s highest usage tier free for six months to 10,000 selected researchers.
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