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.

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Model ID	gemini-3.1-flash-image
Supported inputs & outputs	Inputs: Text, Images, Video (Preview) Outputs: Text and image
Token limits	Maximum input tokens: 131,072 Maximum output tokens: 32,768
Capabilities	Supported Image generation Interleaved images and text Edit images Multi-turn image editing Image generation from video input Grounding with Google Search System instructions Count Tokens Thinking Content Credentials (C2PA) Not supported Code execution Supervised fine-tuning Continuous tuning Preference tuning Tuning checkpoints Function calling Gemini Live API Implicit context caching Explicit context caching Chat completions
Consumption options	Supported Provisioned Throughput Standard PayGo Flex PayGo Batch inference 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, 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
	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: 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) 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 Launch stage: GA Release date: May 28, 2026 Discontinuation 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.
Supported languages	See Supported languages.
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

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. 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.

The following features remain in Preview:

• 4K image outputs
• Video inputs