Nano Banana 2 API
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
textimage
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
FastRouterFamily
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