Using Gemini 3.5 Flash on OpenRouter

Implementation guide · Gemini 3.5 · Google DeepMind

Serverless

OpenRouter exposes Gemini 3.5 Flash through model ID google/gemini-3.5-flash. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-15. Next refresh: weekly.

Quick Start

  1. 1
    Create an account at OpenRouter and generate an API key.
  2. 2
    Use the OpenRouter SDK or REST API to call google/gemini-3.5-flash — see the documentation for request format.
  3. 3
    You'll be billed $1.50/1M input, $9.00/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

TypePrice (per 1M)
Input tokens$1.50
Output tokens$9.00
Image input$1.00
Video input$1.00
Audio input$1.00

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured OutputsCode ExecutionPrompt CachingBatch APIAudio

About Gemini 3.5 Flash

Gemini 3.5 Flash is Google DeepMind's generally available Flash model for sustained frontier-level performance on agentic and coding tasks. It supports multimodal inputs, native thinking, tool and function calling, structured outputs, code execution, search grounding, batch processing, and long contexts up to 1M tokens.

Full model details →

Model Specs

Released2026-05-19
Context1.05m
ArchitectureDecoder Only
Knowledge cutoff2025-01

More Models on OpenRouter

Gemini 3.5 Flash-Lite
All models on OpenRouter →

Also available on(3)

Google AI Studio$1.50/1MGCP Vertex AI$1.50/1MVercel AI Gateway$1.50/1M
Compare all providers →

Provider

OpenRouter

OpenRouter, Inc.

New York, NY, USA