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FastRouter

Nano Banana 2 API

FastRouter
About

Build advanced reasoning agents with Nano Banana 2, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.50/1M input and $3.00/1M output tokens. Access Nano Banana 2 via the FastRouter API with up to 66K output tokens.

Capabilities

Input Modalities

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Output Modalities

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Reasoning
Yes
Structured Output
No
Tool Use
No
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
66K

Tokens

Input Limit
66K

Tokens

Max Output
66K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.50
Output
$3.00
Frequently Asked Questions

Nano Banana 2 by FastRouter costs $0.50 per 1M input tokens and $3.00 per 1M output tokens.

Model Details
ID
google/gemini-3.1-flash-image-preview
Provider
FastRouter
Family
gemini-flash
Release Date
Feb 26, 2026
Knowledge Cutoff
Jan 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
FASTROUTER_API_KEY
API Base URL
https://go.fastrouter.ai/api/v1
Documentation