# Flux 2 | Flash | Text to Image

FLUX.2 [dev] from Black Forest Labs enables fast text-to-image generation with enhanced realism, sharper text rendering, and built-in native editing capabilities.

## API Information

- **Model Slug:** flux-2-flash-text-to-image
- **Branded URL:** https://www.eachlabs.ai/black-forest-labs/flux-2/flux-2-flash-text-to-image
- **Provider:** Black Forest Labs
- **Category:** Text to Image
- **Output Type:** array
- **Status:** active
- **Version:** 0.0.1
- **Base Cost:** Per-megapixel pricing (round rounding)
- **Estimated Processing Time:** 1 seconds
- **Last Updated:** 2026-07-06
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/flux-2-flash-text-to-image

## Pricing

- **Charge Type:** dynamic
- **Pricing Details:** Per-megapixel pricing (round rounding)

### Pricing Rules

| Condition | Pricing |
| --- | --- |
| output.width < "708" AND output.height < "708" | Minimum 1 MP for small images (< 708x708, round rounding) |
| Rule 2 | Per-megapixel pricing (round rounding) |

## Input Schema

| Parameter | Type | Required | Default | Constraints | Description |
|-----------|------|----------|---------|-------------|-------------|
| prompt | string | Yes | - | - | The prompt to generate an image from. |
| guidance_scale | number | No | 2.5 | 0–20 | Guidance Scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you. |
| image_size | string | No | landscape_4_3 | square_hd,square,portrait_4_3,portrait_16_9,landscape_4_3,landscape_16_9 | The size of the image to generate. The width and height must be between 512 and 2048 pixels. |
| num_images | integer | No | 1 | 1–4 | The number of images to generate. |
| enable_prompt_expansion | boolean | No | false | - | If set to true, the prompt will be expanded for better results. |
| enable_safety_checker | boolean | No | true | - | If set to true, the safety checker will be enabled. |
| output_format | string | No | png | jpeg,png,webp | The format of the generated image. |
| seed | integer | No | - | - | The seed to use for the generation. If not provided, a random seed will be used. |

## 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": "flux-2-flash-text-to-image",
  "input": {
    "prompt": "A astronaut kneels beside a glowing alien flower field on a distant planet, with delicate crystalline petals pulsing softly beneath a vast, unfamiliar sky. The astronaut’s suit reflects the neon blues and purples of the flora, contrasting with the dark, dusty ground. A massive ringed planet rises on the horizon, partially veiled by thin mist. Cold twilight light casts long, surreal shadows, heightening the sense of isolation and wonder. Shot macro (100mm) focusing on the foreground flowers, aperture f/2.8 for shallow depth of field, low-angle POV, cinematic composition, blending advanced technology with otherworldly nature, ultra-realistic textures, high detail, film still quality."
  }
}'
```

## 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

**flux-2-flash-text-to-image — Text-to-Image AI Model**

flux-2-flash-text-to-image from Black Forest Labs delivers ultra-fast text-to-image generation optimized for real-time workflows, producing photorealistic images with sharp text rendering in under a second on modern GPUs. Part of the innovative flux-2 family, this model solves the need for speed in AI image generation without compromising quality, enabling developers and creators to iterate rapidly on **text-to-image AI model** projects. Whether you're building apps requiring instant previews or handling high-volume **Black Forest Labs text-to-image** tasks, flux-2-flash-text-to-image stands out with its rectified flow transformer architecture for consistent, prompt-adherent outputs up to 4 megapixels.

## 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.