Gemini 4 Argon (High)

Gemini 4 Argon is Google DeepMind's flagship Gemini 4 reasoning model for long-horizon software engineering, enterprise knowledge work (legal and finance), cybersecurity defense, and multimodal understanding (charts and video). It shares a 1,048,576-token context window and supports long decodes up to 1M tokens. As of 2026-10-13 it is generally available on the Gemini API paid tier (endpoint id gemini-4-argon); it is not available on the free tier. Introductory Gemini API pricing is $2.00 per million input tokens, $10.00 per million output tokens (including thinking tokens), and $0.10 per million cached input tokens through 2026-11-30; standard pricing of $4.00/$20.00/$0.20 begins 2026-12-01. Explicit caching is not supported (implicit caching only). Thinking levels are low, medium, and high.