Google (GOOGL) appears to have stealth-launched its next-generation flagship model, Gemini 4 Pro, ahead of schedule, according to a report. An anonymous model named "gemini-3.8-flash" recently appeared on the AI model arena platform Arena, and after extensive testing by multiple developers, it is widely believed to be an early checkpoint version of Gemini 4 Pro disguised under an older model's name. Leaked benchmark data shows the model leading OpenAI's Astra and Anthropic's Fable 5.1 across coding, AI agent capabilities, reasoning, and computer operation tasks. Google's last major update to the Gemini Pro series was seven months ago, when it released Gemini 3.1 Pro. CEO Sundar Pichai had previewed at Google I/O that Gemini 3.5 Pro would launch in June, but it ultimately failed to ship on schedule. Earlier this month, reports emerged that Google had canceled Gemini 3.5 Pro due to insufficient performance gains. Google confirmed in a July 21 post announcing Gemini 3.6 Flash that it had "begun its most ambitious pre-training effort to date," and two days later, Pichai reiterated this on Alphabet's Q2 earnings call, stating that Google must rely on Gemini 4 to remain competitive in the frontier model race. The sudden appearance of a model also named "gemini-3.8-flash" on Arena is particularly unusual, given that Google officially released Gemini