Will the next Google Gemini Pro model be released by October 31, 2026?

Leaked benchmark data and internal testing of a Gemini 4 Pro candidate point to an imminent release, so the next Google Gemini Pro model is likely to be launched by October 31.

The public assessment is that a new Gemini Pro model is likely to be released by October 31. The primary evidence is the appearance of a high-performing Gemini 4 Pro candidate on the LMSYS Arena benchmarking platform on September 17, coupled with the removal of the previous Pro model from developer tools. These signals indicate that Google has moved beyond the scrapped Gemini 3.5 Pro pipeline and is refining a Gemini 4 Pro release. On the other hand, the company has been months behind schedule on Pro models, suffered key leadership departures, and has made no official commitment to a public launch date. The probability reflects that the leaked evidence, combined with the pattern of late releases and industry pressure from competitors, outweighs these concerns, making a launch by the deadline the more likely outcome.