Originally published on AI Tech Connect.
What you need to know Flash has shipped, Pro has not. Gemini 3.5 Flash reached general availability on 19 May 2026. Gemini 3.5 Pro is in limited preview for select Vertex AI customers, with general availability only expected in June 2026 — Google has not committed to a date. Flash is the new default. It now powers the Gemini app and Google Search AI Mode, and Google markets it as roughly four times faster on output tokens per second than other frontier models. Flash beats last year's Pro on many benchmarks — but still trails Gemini 3.1 Pro on the hardest reasoning and the deepest long-context retrieval. Pro is slated to bring a 2M-token context window and stronger hard-reasoning, but those specifics are reported and expected, not confirmed shipped. The real signal is Omni. Google…
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