> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crazyrouter.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Gemini Image Generation

> Current Gemini image-generation behavior updated from the 2026-04-14 Crazyrouter production retest

> Дата обновления: 2026-06-06

# Gemini Image Generation

```
POST /v1beta/models/{model}:generateContent
```

As of April 14, 2026, the latest production retest against Crazyrouter showed:

* `nano-banana-2` returned `inlineData` when called with `responseModalities: ["IMAGE"]`
* `nano-banana-pro` returned `text` containing a Markdown image with a `data:image/...;base64,...` payload
* `nano-banana` also returned `text` containing `data:image/...;base64,...`
* `nano-banana` returned `text` containing a hosted image URL

<Warning>
  Gemini image models do not currently share one uniform response shape on Crazyrouter. Do not assume every model will return `inlineData`.
</Warning>

<Note>
  If you are migrating from the Nano Banana family, do not keep using `/v1/images/generations`. `nano-banana-2` should now move directly to `nano-banana-2:generateContent`. `nano-banana` can return image output through `nano-banana:generateContent`, but billing consistency is still under review.
</Note>

***

## Most Practical Current Example

For the specific goal of getting image bytes directly, the easiest current model to handle is `nano-banana-2`:

```bash theme={null}
curl "https://api.crazyrouter.com/v1beta/models/nano-banana-2:generateContent?key=YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "contents": [
      {
        "role": "user",
        "parts": [
          {"text": "Generate an IMAGE of a simple red square on a white background. Return image output."}
        ]
      }
    ],
    "generationConfig": {
      "responseModalities": ["IMAGE"]
    }
  }'
```

Observed production response shape:

```json theme={null}
{
  "candidates": [
    {
      "content": {
        "parts": [
          {
            "inlineData": {
              "mimeType": "image/png",
              "data": "iVBORw0KGgoAAA..."
            }
          }
        ]
      }
    }
  ]
}
```

***

## Other Observed Output Shapes

The same-day production check also showed these model-specific differences:

* `nano-banana-pro`: `parts[0].text` looked like `![image](data:image/jpeg;base64,...)`
* `nano-banana`: `parts[0].text` looked like `![image](data:image/png;base64,...)`
* `nano-banana`: `parts[0].text` looked like `![Image](https://...)`

If you need to support multiple Gemini image models, parse in this order:

1. Check `inlineData` first
2. Then check whether `text` contains `data:image/`
3. Then check whether `text` contains a hosted image URL

<Note>
  This page no longer keeps aspect-ratio or multi-image parameter guidance, because those parameters were not revalidated in this production pass.
</Note>