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Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview)

google/gemini-3.1-flash-image-preview

Released Feb 26, 202665,536 context
$0.25/M input tokens$1.50/M output tokens$60/M tokens

Gemini 3.1 Flash Image Preview, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines advanced contextual understanding with fast, cost-efficient inference, making complex image generation and iterative edits significantly more accessible. Aspect ratios can be controlled with the image_config API Parameter

Recent activity on Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Total usage per day on OpenRouter

Prompt
11.1M
Completion
9.19M
Reasoning
5.33M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.