Gemini 4 Carbon Low/Medium/High variants spotted in Google Antigravity build, not yet public
testingcatalog · x · 2026-11-10
Leaker testingcatalog found three Gemini 4 Carbon variants — Low, Medium, and High — added to the latest Google Antigravity build, alongside an entry resembling 'gemini-4-carbonccpa'. Screenshots show them marked 'Preview only' and unavailable to the public. The model picker also lists Gemini 4 Argon Medium, Gemini 3.8 Flash, Claude Opus 5.5, Claude Sonnet 5.5, GPT-OSS 120B, and an Orchestrator option. This is the first time Gemini 4 Carbon appears under concrete model names inside a Google tool build, suggesting the next flagship is in internal testing.
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