Rumor: Gemini 4 Carbon checkpoint spotted in internal tool and Arena

Zaba @zzaba_aOriginally posted 2026.10.27

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👀Rumors about Gemini 4 Carbon👀 It seems that Googlers are testing some kind of Carbon checkpoint on their internal coding tool (Jetski). One person said that the coding feels like Opus 5.5. But it's just the opinion of one person, not a benchmark. It's also like the Carbon checkpoint lit up on Chatbot Arena and 3D was praised there. I remind you that Argon (the first Gemini 4) has already been released to the public on October 13. Let's see if it will be confirmed or not.