Gemini 3.1 Flash Image Preview

Gemini 3.1 Flash Image (Nano Banana 2) is optimized for image understanding and generation and offers a balance of price and performance.

Image generation specifications

Generating images with Gemini 3.1 Flash Image consumes tokens based on output image resolution: 747 tokens for 512p (0.25MP), 1120 tokens for 1K (1MP), 1680 tokens for 2K (4MP), and 2520 tokens for 4K (16MP).

Try in Agent Studio Deploy example app

Note: "Deploy example app" requires a Google Cloud project with billing and Agent Platform API enabled.
Model ID gemini-3.1-flash-image-preview
Modalities
Text Input and output
Image Input and output
Audio Not supported
Video Not supported
Token limits Context window 131,072
Maximum output tokens 32,768
Capabilities
Consumption options
See Consumption options for more information.
Input size limit 500 MB
Technical specifications Image
  • Maximum images per prompt: 14
  • Maximum file size per file for inline data or direct uploads through the console: 7 MB
  • Maximum file size per file from Google Cloud Storage: 30 MB
  • Maximum number of output images per prompt: Limited to 32,768 output tokens
  • Supported aspect ratios: 1:1, 1:4, 1:8, 3:2, 2:3, 3:4, 4:1, 4:3, 4:5, 5:4, 8:1, 9:16, 16:9, and 21:9
  • Supported MIME types:
    image/png, image/jpeg, image/webp, image/heic, image/heif
Text
  • Maximum number of files per prompt: As supported by the 128k token context window
  • Maximum number of pages per file: As supported by the 65,536 token context window
  • Maximum file size per file for the API or Cloud Storage imports: 50 MB(application/pdf) or 7 MB(text/plain)
  • Maximum file size per file for direct uploads through the console: 7 MB
  • Supported MIME types:
    application/pdf, text/plain
Parameter defaults
  • Temperature: 0.0-2.0 (default 1.0)
  • topP: 0.0-1.0 (default 0.95)
  • topK: -
  • candidateCount: 1
Supported regions

Model availability
  • Global
    • global
See Deployments and endpoints for more information.
Knowledge cutoff date January 2025
Versions
  • gemini-3.1-flash-image-preview
    • Launch stage: Public preview
    • Release date: February 26, 2026
    • Retirement date: July 17, 2026
Pricing See Pricing.