Gemini 3.5 Flash (deprecated)
Google deprecated Gemini 3.5 Flash on October 8, 2026; API requests to it are routed automatically to a newer Flash model.
- Lab
- Google DeepMind
- Release date
- Status
- Deprecated
- API model ID
- gemini-3.5-flash
In its Gemini API changelog entry of October 8, 2026, Google marked Gemini 3.5 Flash (gemini-3.5-flash) as deprecated and replaced by Gemini 3.6 Flash, with Gemini 3.8 Flash as another option. API requests are routed automatically, and Google asks developers to update their model strings.
- Availability
- API requests automatically routed. Recommended replacement: gemini-3.6-flash or gemini-3.8-flash.
- Official source
- ai.google.dev
- Last checked
Questions
Is Gemini 3.5 Flash deprecated?
Yes, since October 8, 2026.
What replaces Gemini 3.5 Flash?
Google names Gemini 3.6 Flash, or Gemini 3.8 Flash.
Do old requests to gemini-3.5-flash still work?
Google says API requests are automatically routed to the replacement.
Source
Release dates, model IDs and limits come from each lab’s own announcement, changelog, documentation or deprecations page, linked on every model with the date it was last checked. How we pick and check sources: editorial standards.