Gemini 4 Argon launches: Chromium refactor and API pricing
Google says Gemini 4 Argon compressed months of Chromium refactoring into weeks, and announced introductory API pricing of $2/$10 per million tokens with a 95% discount on cached input.
Today, Gemini 4 Argon is officially rolling out. Google says it helped turn months of Chromium refactoring into weeks. Inside a 40M-line codebase, it helped separate core webpage handling from a ~6M-line legacy feature folder, with changes across hundreds of files. Two other engineering results stood out: • ADK Python: worked autonomously overnight, cutting long-session preparation time by 40% and speeding up cold imports by 21%. The changes are already upstream. • Gemma: delivered a 2.85× end-to-end inference speedup on A100 through vLLM, with 100% token parity in the reported test. Intro API pricing: $2 input / $10 output per million tokens through November 30, with a 95% discount on cached input. This is the work I want coding agents doing: untangling old code, finding bottlenecks, and producing patches a team can verify. What would an agent need to prove before you’d trust it with a production refactor?