In mid-May, Google announced Gemini 3.5 Flash at I/O 2026 and said the Pro version would arrive in June. That deadline has passed.

July 16 : Alphabet's Google is months behind schedule on the release of Gemini 3.5 Pro, its most powerful flagship AI model, as the tech giant works to improve its capabilities,…

Google delayed Gemini 3.5 Pro from June to July 2026 to improve coding performance, as competition from OpenAI's GPT-5.6 and xAI's Grok 4.5 intensifies.