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Soft light ribbons looping around a translucent glass ring on a dark background, abstract hero artwork for Gemini 3.5 Flash

Google

Gemini 3.5 Flash

Google's I/O 2026 Flash for agents and coding, launched ahead of Gemini 3.1 Pro on two agentic benchmarks.

Chat with Gemini 3.5 Flash in Super AgentView pricing

What is Gemini 3.5 Flash?

Gemini 3.5 Flash is the Flash model Google released at Google I/O on May 19, 2026.

Google called it its strongest agentic and coding model at launch, ahead of Gemini 3.1 Pro on Terminal-Bench 2.1 and MCP Atlas, and said it ran four times faster than other frontier models in output tokens per second. Super Agent runs it on Google Cloud's Vertex AI, which lists its retirement for May 19, 2027 or later.

Provider
Google
Context window
1M tokens
Input
Text, Image, Video, Audio, PDF
Reasoning
Low, medium, high
Max output
65,536 tokens
Knowledge cutoff
January 2025
Released
May 19, 2026

How Gemini 3.5 Flash performs

Published by Google

Results Google reported for Gemini 3.5 Flash. Each lab runs its own setup, so compare these with other models only inside the same table.

Benchmark results Google published for Gemini 3.5 Flash
BenchmarkScoreSetting
Terminal-Bench 2.176.2%Terminus-2 harness
SWE-Bench Pro (Public)55.1%single attempt
MCP Atlas83.6%
Toolathlon56.5%
OSWorld-Verified78.4%
Finance Agent v257.9%
CharXiv Reasoning84.2%no tools
MMMU-Pro83.6%no tools
Humanity's Last Exam40.2%
ARC-AGI-272.1%

Source: deepmind.google

What you can do with Gemini 3.5 Flash

  • Ahead of Gemini 3.1 Pro on Terminal-Bench 2.1 and MCP Atlas at launch

  • Four times faster output than other frontier models, Google said

  • Built for long-horizon agent tasks and subagents

  • Takes PDFs, audio and video as well as text and images

How to prompt Gemini 3.5 Flash

  • Attach a PDF brief and ask for a summary or a shot list from it.
  • Use low effort for quick replies; it is built for speed.
  • Split big jobs into separate tasks that can run side by side.

Where Gemini 3.5 Flash fits best

  • Parallel tasks in an agent run

  • Interactive web UI ideas

  • Reading PDFs and long documents

  • Everyday multimodal chat

How Gemini 3.5 Flash compares

Gemini 3.5 Flash compared with other chat models on Flashloop
ModelLMArena textLMArena codingContext windowReasoning
Gemini 3.5 Flash1477#301508#621M tokensLow, medium, high
Claude Sonnet 5.51478#291528#261M tokensLow to max
GPT-6 Astra1477#321543#91.05M tokensLow to max
GPT-6.1 Sol1480#271537#141.05M tokensLow to max
GLM-5.31481#261521#331M tokensLow, medium, high, max

Good to know before you start

  • Gemini 3.6 Flash and 3.7 Flash are newer Flash models in the same picker
  • Output is text only, even though it accepts audio and video; media comes from Flashloop's generation models

Start chatting with Gemini 3.5 Flash

Chat with Gemini 3.5 Flash in Super Agent

  1. Select Gemini 3.5 Flash

    Open Super Agent on Flashloop and choose Gemini 3.5 Flash in the model picker.

  2. Enter your prompt

    Ask for what you need: an answer, a plan, or the images and videos you want the agent to make.

  3. Send and keep going

    Send the message. Gemini 3.5 Flash answers in Super Agent and runs any generations you asked for.

Questions about Gemini 3.5 Flash

Which model answers when I pick Gemini 3.5 Flash?

Gemini 3.5 Flash itself. Super Agent calls it through Google Cloud's Vertex AI. On October 8, 2026 Google started sending requests for this name to Gemini 3.6 Flash on the Gemini API, but Vertex AI still serves Gemini 3.5 Flash and lists its retirement for May 19, 2027 or later.

What is Gemini 3.5 Flash good at?

Agentic and coding work. At launch Google said it beat Gemini 3.1 Pro on Terminal-Bench 2.1 and MCP Atlas, and it became the default model in the Gemini app.

What inputs does Gemini 3.5 Flash accept?

It takes text, images, video, audio and PDFs within a 1M-token window.

How is Gemini 3.5 Flash different from Gemini 3.5 Flash Lite?

Flash Lite is Google's fastest, lowest-cost 3.5-class model for high-volume work and subagent tasks. Gemini 3.5 Flash is the fuller model for coding and agents.

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