Gemini API deprecates 3.7 and 3.5 Flash, automatically routing requests to replacements
Google's October 8, 2026 release notes deprecate Gemini 3.7 Flash and 3.5 Flash. Requests automatically route to Gemini 3.8 Flash and 3.6 Flash respectively; Google recommends updating model strings.
SessionWatcher editorial · Published · Updated · Source announcement: 2026-10-08
Related guide: How to check your Gemini usage
Which Gemini API models changed
Google's October 8, 2026 release notes say Gemini 3.7 Flash is deprecated and replaced by Gemini 3.8 Flash. Gemini 3.5 Flash is also deprecated and replaced by Gemini 3.6 Flash.
All requests to gemini-3.7-flash are automatically routed to gemini-3.8-flash. All requests to gemini-3.5-flash are automatically routed to gemini-3.6-flash.
Sources: Gemini release notes: 2026-10-08
What to change in API requests
Google tells users of Gemini 3.7 Flash to update their model string to gemini-3.8-flash. For Gemini 3.5 Flash, it recommends gemini-3.6-flash or gemini-3.8-flash.
The announcement does not state pricing or quota changes for these replacements.
Sources: Gemini release notes: 2026-10-08
AI assisted reporting, checked against the linked official sources. Source pages checked 2026-10-11. Editorial process and corrections.