Google retires two Gemini Flash model ids
gemini-3.7-flash and gemini-3.5-flash now route to newer Flash models, and an old Deep Research agent shuts down on 23 October.
Official source (opens in a new tab)
The Gemini API changelog for 8 October 2026 deprecates gemini-3.7-flash and gemini-3.5-flash. Requests to the first are routed to gemini-3.8-flash. Requests to the second are routed to gemini-3.6-flash. Neither old id can be selected in Google AI Studio. The same note says the Deep Research agent deep-research-pro-preview-12-2025 will shut down on 23 October 2026. Google points migrations at deep-research-preview-04-2026 or deep-research-max-preview-04-2026.
Who it's for: anyone with those model strings in production code.
Fits: Best for Research, because the Deep Research agent change is the part that affects how a long sourced brief gets built. The Flash renames matter to anyone calling Gemini for drafts or tools as well.