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Daily Brief: Gemini 4 Argon goes wide, states sue OpenAI, and the frontier race reopens

Google opens Gemini 4 Argon at $2/$10 per million tokens, eight US states sue OpenAI over child safety, and Meta's Muse Wonder Full joins the frontier.

Google opens Gemini 4 Argon to everyone and undercuts the frontier on price

Google has taken Gemini 4 Argon, its new frontier model, to general release: it is now in the paid Gemini API via AI Studio, in Google Antigravity for AI Ultra subscribers, and in the Gemini app and AI Mode in Search for AI Ultra and Pro users. The introductory price is $2 per million input tokens and $10 per million output, with cached input 95% off, rising to $4 and $20 after November 30. Google says Argon tops the Vals Index for finance, coding, legal and tax work and offers a 1M unified input-output token limit. The benchmark claims are Google's own, but the pricing is the real lever: developers now have a frontier-class option at a fraction of rival rates, at least until December. Google's announcement

What else matters

Eight US states sue OpenAI over ChatGPT safety for kids. Iowa, Kansas, Nebraska, West Virginia, Arkansas, Arizona, Idaho and Montana filed separate suits alleging OpenAI broke consumer protection laws by presenting ChatGPT as safe for young users, collecting minors' data and doing too little to keep under-age users out. They want civil penalties and, in some cases, deletion of data. OpenAI says it has built "industry-leading age-specific protections." The Verge

Meta and Google turn the frontier into a four-way race. Days before Argon, Meta unveiled Muse Wonder Full, which its own testing puts level with GPT-6 Astra, Claude Opus 5.5 and Claude Fable 5.1 on many benchmarks. Together with Argon's aggressive pricing, it ends the sense that OpenAI and Anthropic had the top tier to themselves. The Verge