Model identifier: gemini-4-argon.
Google reasoning model for software engineering, mathematical and scientific tasks, and multi-step agents.
The 1,048,576-token context is a unified input/output budget. Synchronous output defaults to 65,536 tokens; long decode supports up to 1,048,576 within that shared budget. Standard paid rates per million tokens are $2 input and $10 output through November 30, 2026; $4 and $20 from December 1. No free API tier. Stable; available through Gemini API and Google AI Studio. Output pricing includes thinking tokens. Tool, caching and alternate service-tier charges are separate. Pricing: https://ai.google.dev/gemini-api/docs/pricing . API access terms: https://ai.google.dev/gemini-api/terms
Official model documentation: https://ai.google.dev/gemini-api/docs/models/gemini-4-argon Researched on 23 October 2026. Undocumented specifications are omitted.