Gemini 4 Argon joins the Standard tier

Gemini 4 Argon - Google's new frontier model, built for deep, long-horizon work - is now available on the Standard tier, next to Claude Opus 5.5. Google released it yesterday; it went through our full verification before reaching the picker: live tool-calling, prompt caching, and token accounting all confirmed on the real wire.

Argon arrives at Google's introductory pricing, which runs through November 30: until then it is one of the cheapest ways to run a frontier model on Playcode. If you want long multi-step builds, large refactors or research-heavy work at well under flagship spend, this is the moment to try it.