The one rising to $4 on November 30 is Carbon; Argon isn’t written into the terms
Author’s note: A footnote from Google says that once the introductory period ends on 2026-11-30, the public-facing Gemini 4 Carbon moves to $4 input and $20 output. Argon doesn’t appear anywhere in the terms. This article breaks down the original wording and checks it against current pricing. If your project uses both gemini-4-carbon and gemini-4-argon,…