Google confirmed that introductory API pricing for Gemini 4 Argon expires November 30, 2026, doubling on December 1 to $4 per million input tokens and $20 per million output tokens

From the articleGoogle launches flagship AI model Gemini 4 Argon for developers, businesses | ReutersAlso in Gemini 4 Argon begins rolling out in Gemini app and Antigravity, but only if you pay, Google makes Gemini 4 Argon broadly available with limited-time low API pricing of $2/$10 per 1M token, Google finally releases Gemini 4 Argon