Time to first token (TTFT) measured on AIHubMix is 10.1s on gemini-3.1-flash-image-preview and 35.3s on gemini-3.1-flash-image-preview-free. Measured output throughput is 122.4 tok/s on gemini-3.1-flash-image-preview and 34.2 tok/s on gemini-3.1-flash-image-preview-free.
gemini-3.1-flash-image-previewgemini-3.1-flash-image-preview-freegemini-3.1-flash-image-preview (Nano Banana 2) features professional-grade visual intelligence, lightning-fast efficiency, and realistic, grounded generative capabilities. This model serves as the high-efficiency counterpart to Gemini 3 Pro Image, optimized for speed and high-volume developer use cases.
This model is the free trial version of gemini-3.1-flash-image-preview (officially marketed as Nano Banana 2). To ensure stable service operation, usage limits have been set and resources are limited and may not be available at all times. For a stable version, please choose the official release; the request name for the official release is: gemini-3.1-flash-image-preview.
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
Daily traffic served through AIHubMix — how demand for each model is trending.
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
gemini-3.1-flash-image-preview: 10.1s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
gemini-3.1-flash-image-preview at 122.4 tok/s and gemini-3.1-flash-image-preview-free at 34.2 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
gemini-3.1-flash-image-preview accepts text and image input and supports thinking; gemini-3.1-flash-image-preview-free accepts text and image input.
Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.
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