Gemini 3.1 Flash Image Preview

Preview

This product or feature is a Generative AI Preview offering, subject to the "Pre-GA Offerings Terms" of the Google Cloud Service Specific Terms, as well as the Additional Terms for Generative AI Preview Products. For this Generative AI Preview offering, Customers may elect to use it for production or commercial purposes, or disclose Generated Output to third-parties, and may process personal data as outlined in the Cloud Data Processing Addendum, subject to the obligations and restrictions described in the agreement under which you access Google Cloud. Pre-GA products are available "as is" and might have limited support. For more information, see the launch stage descriptions.

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

Caution: The following table describes image generation endpoints that are deprecated and their replacements. We recommend updating your model endpoints before July 17, 2026, to avoid service disruption.

Discontinued endpoints	Recommended endpoint migration
`gemini-3.1-flash-image-preview`	`gemini-3.1-flash-image`
`gemini-3-pro-image-preview`	`gemini-3-pro-image`

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 Platform (Preview) Deploy example app

Note: To use the "Deploy example app" feature, you need a Google Cloud project with billing and Agent Platform API enabled.

Model ID gemini-3.1-flash-image-preview Supported inputs & outputs

Inputs:
Text, Images
Outputs:
Text and image

Token limits

Maximum input tokens: 131,072

Maximum output tokens: 32,768

Capabilities

Supported

Not supported

Consumption options

Supported

Not supported

Priority PayGo

See Consumption options for more information. Input size limit 500 MB Technical specifications Images

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

Documents

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
Discontinuation date: July 17, 2026

Supported languages See Supported languages. Pricing See Pricing.

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Last updated 2026-06-11 UTC.