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
Modalities	description Text Input and output photo Image Input and output mic Audio Not supported videocam Video Input only
Token limits	Context window	131,072
	Maximum output tokens	32,768
Capabilities	Thinking Supported System instructions Supported Gemini Live API Not supported Structured output Not supported Context caching Implicit context caching Supported Count Tokens Supported RAG Engine Not supported Chat completions Not supported Tuning Not supported URL context Not supported Image generation Image generation, Image generation from video input Supported Edit images Edit images, Multi-turn image editing Supported Interleaved images and text Supported Content Credentials (C2PA) Supported Virtual try-on Not supported
Tools	Grounding Google Search Supported Code execution Not supported Function calling Not supported
Consumption options	Provisioned Throughput Supported Batch inference Supported Pay-as-you-go Standard PayGo, Flex PayGo Supported Fixed quota Not supported
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 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 128k 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
	Video	Maximum number of input video files per prompt: 10 Maximum YouTube URLs per prompt: 1 Maximum video length (without audio): As supported by the 128k token context window (approximately 25 minutes). Supported MIME types: video/x-flv, video/quicktime, video/mpeg, video/mpegs, video/mpg, video/mp4, video/webm, video/wmv, video/3gpp
	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 Multi-region: us, eu
	ML processing	Multi-region: us, eu
	Provisioned Throughput	Global: global Multi-region: us, eu
	Standard PayGo	Global: global Multi-region: us, eu
Versions	gemini-3.1-flash-image Launch stage: GA Release date: May 28, 2026 Retirement date: May 28, 2027 or later
Security controls	Online prediction	Data residency CMEK VPC-SC AXT
	Batch inference	Data residency CMEK VPC-SC AXT
	Context caching	Data residency CMEK VPC-SC AXT
	See Security controls for more information.

Image generation specifications

Gemini 3.1 Flash Image consumes 1,120 tokens per input image.

Output image token consumption varies based on the generated image resolution:

Output resolution	Approximate megapixels	Output image tokens
512	0.25	747
1K	1	1,120
2K	4	1,680
4K	16	2,520

Note: Additional charges apply for input and output tokens for other modalities, such as text and video. 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.