Google Prepares Gemini 3.5 Pro Launch With Massive Context Window
Google plans to release Gemini 3.5 Pro in June 2026, featuring a two-million-token context window and a new "Deep Think" reasoning mode. The model remains in limited preview while independent testers wait to verify the company's ambitious claims.
Google announces that Gemini 3.5 Pro is slated for general availability in June 2026, serving as the company's most powerful AI model of the year. This high-end tier targets the most demanding use cases that Google previously assigned to its top-tier Ultra models, including complex reasoning, deep multimodal tasks, and extended context processing.
The upcoming model features a headline-grabbing two-million-token context window, which allows the system to hold massive documents, large codebases, and lengthy conversations in its working memory at once. Additionally, a new "Deep Think" reasoning mode enables the AI to spend more computational effort working through difficult problems rather than simply providing fast responses.
Despite the promising feature set, Gemini 3.5 Pro has not yet shipped to the public as of early June and remains in a limited enterprise preview. Until independent testers gain access to evaluate the system, these impressive specifications remain unverified claims, and the June target serves as an estimated timeline rather than a firm guarantee.