Gemini 3.1 Flash Image (Nano Banana 2)

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

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
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, 3:2, 2:3, 3:4, 1:4, 4:1, 4:3, 4:5, 5:4, 1:8, 8:1, 9:16, 16:9, 21:9, 9:21
  • Supported resolutions: 512, 1K, 2K, 4K (Preview)
  • 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: 50 MB (API and Cloud Storage imports) or 7 MB (direct upload through Google Cloud console)
  • 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)
  • 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
    • Launch stage: GA
    • Release date: May 28, 2026
    • Retirement date: Not before May 28, 2027
Security controls Online prediction
  • Data residency
  • CMEK
  • VPC-SC
  • AXT
Batch inference
  • Data residency
  • CMEK
  • VPC-SC
  • AXT
See Security controls for more information.
Pricing See Pricing.

Image generation specifications

Gemini 3.1 Flash Image consumes 1120 input image tokens per input image. Gemini 3.1 Flash Image consumes 747 output image tokens for 512 (roughly 0.25MP), 1120 tokens for 1K (roughly 1MP), 1680 tokens for 2K (roughly 4MP), and 2520 tokens for 4K (roughly 16MP). Additional charges for input and output tokens for other modalities such as text and video also apply. Refer to the pricing page for the latest.

For more information about image generation using Gemini 3.1 Flash Image, see Generate and edit images with Gemini.

Preview features

The following features remain in Preview:

  • 4K image outputs
  • Video inputs