Google · Release tracker

Gemini 3.5 Pro release date

Gemini 3.5 Pro has not shipped. Google announced it, missed its own June target, and has not given a new date. Almost everything else you will read about it — the launch date, the context window, the reasoning features — comes from reporting and leaks rather than from Google. This page keeps those two piles separate.

Status as of 2026-07-17.

What Google has confirmed

Confirmed

  • It exists and is in partner testing.

    Google's statement: “We're currently testing 3.5 Pro, an upgraded Flash model, and other models with partners.”

  • It was announced at I/O in May 2026, with Pro promised for June.

    Google announced Gemini 3.5 Flash at I/O and said the Pro version would follow in June.

  • Gemini 3.1 Pro shipped in February 2026.

    That is the current shipping Pro model — the one 3.5 Pro is meant to succeed.

  • An upgraded Flash model is also in testing.

    Google names it in the same statement, with no release date attached.

What has been reported, but not by Google

Bloomberg reports that Google is taking extra time to improve the model's capabilities, particularly in coding, and that the company refreshed its training data in late June with disappointing results. This is the closest thing to an explanation for the slip — but note that Google has never publicly acknowledged missing the June deadline at all. The delay is journalism, not an announcement.

What is repeated everywhere but unconfirmed

Unconfirmed

  • A July 17, 2026 launch date

    Widely reported across outlets. Google has not confirmed this date, or any date, in any source we can find.

  • A 2M token context window

    Reported as double the 1M cap on the previous Pro generation. Third-party reporting only — no Google documentation states this.

  • A “Deep Think” reasoning layer and autonomous workflow features

    Attributed to leaks. No model card, no pricing page, and no official benchmark has been published.

If you are planning around Gemini 3.5 Pro, treat every number in this section as unusable for capacity or budget decisions until Google publishes a model card. A date that has already slipped once, with no replacement date offered, is not a schedule.

Sources

Figures on this page last checked against these sources on 2026-07-17. Vendors change pricing and specs without notice — if a number here disagrees with the vendor's own page, trust the vendor.