# Gemini 3.1 Flash Image (Nano Banana 2)

Gemini 3.1 Flash Image (Nano Banana 2) is a image model from Google. Provider list price is $0.047 per item; on Allocate you pay $0.05 with the 7% transaction fee. It is a closed model served over API; the weights are not published.

## Pricing

| | Provider list | On Allocate |
| --- | --- | --- |
| Price, per item | $0.047 | $0.05 |

Token usage bills at the provider list price plus the 7% transaction fee. Prices checked 2026-07-08.

## Facts

| Field | Value |
| --- | --- |
| Lab | Google |
| Modality | Image |
| License | Proprietary API |
| Open weights | No |
| Fine-tunable | No |
| Catalog id | google/flash-image-3.1 |

## What a real workload costs

Generating 1,000 one-megapixel images costs 1,000 × $0.047 = $46.57 at list, or $49.83 billed on Allocate with the 7% transaction fee included.

## Common questions

### How much does Gemini 3.1 Flash Image (Nano Banana 2) cost?

Provider list price is $0.047 per item (0.04657 for 512x512. For every input image used, it's an additional $0.00028. When using grounded search, $0.014 will be added on top.). On Allocate you pay list plus the 7% transaction fee: $0.05.

### Can I fine-tune Gemini 3.1 Flash Image (Nano Banana 2)?

No. Gemini 3.1 Flash Image (Nano Banana 2) is a closed model served over API; the weights are not published. If you want a model you can train and own, start from an open-weights base in the catalog and fine-tune that.

### How do I call Gemini 3.1 Flash Image (Nano Banana 2) on Allocate?

Send google/flash-image-3.1 in the model field of the OpenAI-compatible endpoint at api.allocate.network/v1, or point a route name (like prod/support-agent) at it so you can swap the model later without a deploy.

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[HTML page](https://allocate.network/models/google-flash-image-3-1) · [Machine-readable catalog](https://allocate.network/catalog.json)