Gemini 4 Pro spotted on LMArena under codename 'Gemini 3.8 Flash', overthinks
XCyberThunder · reddit · 2026-09-29
A user spotted an anonymous model codenamed "Gemini 3.8 Flash high" on LMArena this weekend — reportedly a test alias for Gemini 4 Pro — and posted a demo video showing it says hello with an excessive thinking chain. Unconfirmed by Google, this looks like a typical arena-testing leak.
Related event: Mysterious "Gemini 3.8 Flash" appears on LMArena(3 posts)→
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