Skip to content
Not available in this workspace
OpenRouterOpenRouter
© 2026 OpenRouter, Inc

Product

  • Chat
  • Rankings
  • Benchmarks
  • Apps
  • Discover
  • Models
  • Collections
  • Providers
  • Pricing
  • Enterprise
  • Labs

Company

  • About
  • Blog
  • Careers
    Hiring
  • Privacy
  • Terms of Service
  • Support
  • Works With OR
  • Data

Developer

  • Documentation
  • API Reference
  • Developer Platform
  • Status

Connect

  • Discord
  • GitHub
  • LinkedIn
  • X
  • YouTube
Favicon for google

Google: Gemini 3.5 Flash

google/gemini-3.5-flash

Compare

Gemini 3.5 Flash is Google's high-efficiency multimodal model, bringing near-Pro level coding and reasoning at Flash-tier cost and speed. It is highly optimized for coding proficiency and parallel agentic execution loops, supporting text, image, video, audio, and PDF inputs.

Defaults to medium thinking effort for faster and more cost-efficient responses, with full support for thinking levels (minimal, low, medium, high) for fine-grained cost/performance trade-offs.

Modalities

In / Out Price

$1.50 / $9per 1M

Context

1M

Released

May 19, 2026

Knowledge Cutoff

Jan 2025

Compare

About Google: Gemini 3.5 Flash

OpenRouter makes Google: Gemini 3.5 Flash available through a unified, OpenAI-compatible API using the model ID google/gemini-3.5-flash. Requests can be routed across 2 providers, including Google Vertex (US) and Google AI Studio, with automatic failover when an endpoint is unavailable.

Google: Gemini 3.5 Flash accepts text, images, video, files such as PDFs and audio and returns text. It has a 1,048,576-token context window and a maximum output of 65,536 tokens.

On OpenRouter, Google: Gemini 3.5 Flash costs $1.50/M input tokens and $9.00/M output tokens, with separate rates for Cache Read at $0.15/M tokens, Cache Write at $0.08333/M tokens, Image Input at $1.50/M tokens, Input Audio at $3.00/M tokens, Input Audio Cache at $0.30/M tokens and Web Search at $14.00/1K calls. Effective pricing can be lower when prompt caching applies. It was released on May 19, 2026; its knowledge cutoff is January 1, 2025.

More models from Google

  • Gemini 3.7 Flash
  • Gemini 3.6 Flash
  • Gemini 3.5 Flash Lite

Frequently asked questions

Gemini 3.5 Flash is Google's high-efficiency multimodal model, bringing near-Pro level coding and reasoning at Flash-tier cost and speed. It is highly optimized for coding proficiency and parallel agentic execution loops, supporting text, image, video, audio, and PDF inputs.

Gemini 3.5 Flash costs $1.50/M input tokens and $9.00/M output tokens, with separate rates for Cache Read at $0.15/M tokens, Cache Write at $0.08333/M tokens, Image Input at $1.50/M tokens, Input Audio at $3.00/M tokens, Input Audio Cache at $0.30/M tokens and Web Search at $14.00/1K calls.

Gemini 3.5 Flash has a 1,048,576 token context window. It supports up to 65,536 completion tokens.

Yes. Gemini 3.5 Flash accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Gemini 3.5 Flash accepts text, images, video, files such as PDFs and audio as input and returns text.

Gemini 3.5 Flash is served by 2 providers on OpenRouter: Google Vertex (US) and Google AI Studio. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

Gemini 3.5 Flash was released on May 19, 2026. Its knowledge cutoff is January 1, 2025.