Google's Gemini 3.5 Pro — announced at I/O in May 2026 with a 2-million-token context window and a Deep Think reasoning layer — slipped again in mid-July. After reportedly targeting a July 17 launch, Google delayed the release when the model missed internal quality goals on hallucination rates and real-world reliability.
Back to the drawing board
According to reporting, DeepMind scrapped and rebuilt the base model rather than ship something below its standards, leaving no confirmed date, context-window figure or pricing. For now, the faster Gemini 3.5 Flash — recently upgraded with agentic Computer Use — remains Google's current stable flagship, while the more powerful Pro tier stays in limited preview.