Google has begun teasing Gemini 4, but there is still no official public release date, no API listing, and no benchmark sheet for a model by that name. Google’s latest public Gemini documentation and release activity still center on the Gemini 3.x family, including Gemini 3.1 and Gemini 3.5 variants, and Google has not publicly released a model officially named Gemini 4. The buzz around Gemini 4 comes from Google’s own teasing and the pattern of its model rollout cadence, with some analysts believing a late-year launch would fit Google’s historical timing. The strongest claim currently available is that Google has started pre-training what it describes as its most ambitious run yet. Multiple reports point to a possible major-model window around November or December, as they fit a plausible launch cycle for a model that is still in training and not yet publicly documented. The most responsible reading is that late 2026 is plausible, while anything more exact remains speculative.