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.

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.

Technical specifications
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 Grounding with Google Search System instructions Count Tokens Thinking Content Credentials (C2PA) Image generation Interleaved images and text Edit images Multi-turn image editing Not supported Code execution Supervised fine-tuning Continuous tuning Preference tuning Tuning checkpoints Function calling Gemini Live API Implicit context caching Explicit context caching Vertex AI RAG Engine Chat completions
Consumption options	Supported Provisioned Throughput Standard PayGo Flex PayGo Batch prediction Not supported Priority PayGo
Consumption options	See Consumption options for more information.
Input size limit	500 MB
	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
Supported languages	See Supported languages.
Pricing	See Pricing.

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Image generation specifications

Gemini 3.1 Flash Image Preview