Deprecated, with API calls silently routed to 3.6 Flash, so check what you are actually being billed for.
Kenning's take
What it does
Gemini 3.5 Flash launched at Google I/O 2026 as the first of a series pairing frontier-level intelligence with action. Google said it beat Gemini 3.1 Pro on several coding and agent benchmarks and made it the default model in AI Mode. It is now deprecated in the API, with requests automatically sent to Gemini 3.6 Flash.
- Long-horizon agentic tasks
- Coding and terminal tasks
- 1 million token input context
- Computer use support (preview)
Who it suits. Developers building agents and Gemini app and Search users.
Key facts
- Category
- AI models
- Part of
- Google Gemini
- Made by
- Based in
- United States
- Released
- 19 May 2026
- How to get it
- Was generally available in the Gemini API, AI Studio, Antigravity and Android Studio; API requests now route to Gemini 3.6 Flash
- Works on
- API, Web
- In the UK
- Yes
FAQ
When was Gemini 3.5 Flash released?
At Google I/O on 19 May 2026.
Can I still use Gemini 3.5 Flash?
It is deprecated. Requests to gemini-3.5-flash are automatically routed to Gemini 3.6 Flash.
Facts from the maker's own pages and the sources listed. Checked 2026-10-11.
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