# Gemini 3  | Pro | Image Preview

Gemine 3 Pro generates high quality images from text with smooth, precise and visually immersive results.

## API Information

- **Model Slug:** gemini-3-pro-image-preview
- **Branded URL:** https://www.eachlabs.ai/google/gemini-3/gemini-3-pro-image-preview
- **Provider:** Google
- **Category:** Text to Image
- **Output Type:** array
- **Status:** active
- **Version:** 0.0.1
- **Base Cost:** Charge $0.15 per image generation
- **Estimated Processing Time:** 0 seconds
- **Last Updated:** 2026-04-06
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/gemini-3-pro-image-preview

## Pricing

- **Charge Type:** dynamic
- **Estimated Price (default example):** $0.1500
- **Pricing Details:** Charge $0.15 per image generation

### Pricing Rules

| Rule | Condition | Price |
| --- | --- | --- |
| multiply_numeric | num_images (per unit) | $0.1500 |

## Input Schema

| Parameter | Type | Required | Default | Constraints | Description |
|-----------|------|----------|---------|-------------|-------------|
| prompt | string | Yes | - | - | The text prompt to generate an image from. |
| num_images | integer | No | 1 | 1–4 | The number of images to generate. |
| aspect_ratio | string | No | 1:1 | 21:9,16:9,3:2,4:3,5:4,1:1,4:5,3:4,2:3,9:16 | The aspect ratio of the generated image. |
| output_format | string | No | png | jpeg,png,webp | The format of the generated image. |
| resolution | string | No | 1K | 1K,2K,4K | The resolution of the image to generate. |

## Example Request

```bash
curl -X POST https://api.eachlabs.ai/v1/prediction/ \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gemini-3-pro-image-preview",
  "input": {
    "prompt": "Ultra-realistic photo of a male lion in natural daylight, sharp details, rich fur texture, lifelike eyes, natural colors, soft background blur, professional wildlife photography style"
  }
}'
```

## Output Schema

Response returned by `GET /v1/prediction/{id}` when the job completes:

```json
{
  "status": "success",
  "predictionID": "string",
  "output": "array",
  "metrics": {
    "predict_time": "number (seconds)"
  }
}
```

## Polling

```bash
curl https://api.eachlabs.ai/v1/prediction/{PREDICTION_ID} \
  -H "X-API-Key: YOUR_API_KEY"
```

| Status | Meaning |
|--------|---------|
| `processing` | Still running — poll again |
| `success` | Done — read `output` |
| `error` | Failed — read `message` / `details` |

## Webhook (alternative to polling)

Pass `"webhook_url": "https://your.host/path"` in the create request. Eachlabs POSTs this payload when the job ends:

```json
{
  "exec_id": "prediction-uuid",
  "status": "succeeded",
  "output": "https://...",
  "error": ""
}
```

`status` is `"succeeded"` or `"failed"`. `exec_id` equals the `predictionID` from create. Return 2xx within 30 seconds.

## Errors

Error body: `{ "status": "error", "message": "...", "details": "..." }`

| Code | Meaning |
|------|---------|
| `400` | Invalid input |
| `401` | Missing / invalid `X-API-Key` |
| `404` | Unknown model or prediction id |
| `429` | Rate limit — 100 creates / min, 10 concurrent per key |
| `5xx` | Retry with backoff |

## Overview

**gemini-3-pro-image-preview — Image Generation AI Model**

gemini-3-pro-image-preview, Google's advanced **text-to-image AI model** from the Gemini 3 family and known as Nano Banana Pro in its "Thinking" mode, transforms complex text prompts into high-fidelity images with native 4K resolution and superior text rendering. Developers and creators seeking a **Google text-to-image** solution benefit from its deliberative reasoning process that grounds generations in real-world knowledge via Google Search, ensuring accurate depictions of current events, diagrams, or data visualizations. This **gemini-3-pro-image-preview API** stands out by supporting up to 14 reference images for precise multi-source compositions, delivering professional results in about 8 seconds at 1024x1024 by default, scalable to 4096x4096.

## Usage Notes

- API Base URL: `https://api.eachlabs.ai/v1`
- Authentication: send `X-API-Key: YOUR_API_KEY`. Generate a key from the Eachlabs dashboard at https://www.eachlabs.ai/dashboard/api-keys.
- File-typed parameters (`*_url`, `image_url`, `video_url`, `audio_url`, etc.) accept publicly-reachable HTTPS URLs only. Upload your asset first (GCS / S3 / your CDN) and pass the resulting URL. Data-URIs and localhost URLs are rejected.
- For structured parameters (arrays / objects) send real JSON values, not stringified payloads.
- Monetary values are reported in USD; per-token / per-megapixel rates may be billed in micro-cents internally.
- Prefer `webhook_url` over polling for long-running predictions — see the Webhook Callback section.