Gemini 4 Carbon spotted in partner early access on LMArena

Astro Polo @astropol0Originally posted 2026.10.21

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Looks like Gemini 4 Carbon is already in partner early access and running on LMArena… early words indicating stronger at 3D than Argon, a bit slower but less lazy with responses.. UI still rough public release looking close….

This post quotes another post: “Rumor: Google tests internal Gemini 4 Carbon checkpoint, likened to Opus 5.5 for coding”