# Seedream V3 | Text to Image

Seedream 3.0 is a dual-language (Chinese and English) model optimized for generating images from text prompts.

## API Information

- **Model Slug:** seedream-v3-text-to-image
- **Branded URL:** https://www.eachlabs.ai/bytedance/seedream-v3/seedream-v3-text-to-image
- **Provider:** ByteDance
- **Category:** Text to Image
- **Output Type:** array
- **Status:** active
- **Version:** 0.0.1
- **Base Cost:** $0.03 per generated image
- **Estimated Processing Time:** 30 seconds
- **Last Updated:** 2026-03-26
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/seedream-v3-text-to-image

## Pricing

- **Charge Type:** dynamic
- **Estimated Price (default example):** $0.0300
- **Pricing Details:** $0.03 per generated image

### Pricing Rules

| Condition | Pricing |
| --- | --- |
| Rule 1 | $0.03 per generated image |

## Input Schema

| Parameter | Type | Required | Default | Constraints | Description |
|-----------|------|----------|---------|-------------|-------------|
| prompt | string | Yes | - | - | The text prompt used to generate the image |
| aspect_ratio | string | No | 1:1 | 1:1,3:4,4:3,16:9,9:16,2:3,3:2,21:9 | The aspect ratio of the generated image |
| guidance_scale | number | No | 2.5 | 1–10 | Controls how closely the output image aligns with the input prompt. Higher values mean stronger prompt correlation. |
| num_images | integer | No | 1 | 1–4 | Number of images to generate |
| seed | integer | No | - | - | Random seed to control the stochasticity of image generation. |

## 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": "seedream-v3-text-to-image",
  "input": {
    "prompt": "A cat wearing sunglasses surfing on a slice of pizza in space."
  }
}'
```

## 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

**seedream-v3-text-to-image — Text-to-Image AI Model**

Developed by Bytedance as part of the **seedream-v3** family, **seedream-v3-text-to-image** is a dual-language text-to-image AI model that excels in generating high-aesthetic images from English or Chinese prompts, solving challenges in text rendering and compositional structure for designers and developers.

This **Bytedance text-to-image** model stands out with native 2K resolution support and over 94% text rendering success rate in complex layouts, enabling professional posters and visuals without manual design tools.

Ideal for users seeking a **text-to-image AI model** with superior Chinese-English bilingual capabilities, **seedream-v3-text-to-image** delivers crisp outputs in seconds, making it a top choice for **seedream-v3-text-to-image API** integrations in creative workflows.

## 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.