Google Tests New Gemini 4 Carbon Checkpoint as "Argon 4" on Arena

Google is reportedly testing a new Gemini 4 Carbon checkpoint under the codename "Argon 4" on Arena since October 31. Testers report it is faster, has stronger 3D capabilities, and produces outputs resembling Opus 5.5.

2026-11-02 ~ 2026-11-02 · 2 related posts

• Google reportedly testing Gemini 4 Carbon checkpoint on Arena disguised as Argon 4 — testingcatalog · 2026-11-02
• Gemini 4 Carbon checkpoint spotted on Arena: faster, better 3D, outputs resemble Opus 5.5 — testingcatalog · 2026-11-02