# Flux Flux Kontext Pro — Text To Image

> Access flux kontext image capabilities with FLUX-Kontext-Pro. This 1M-token LLM excels at deep document reasoning and multimodal analysis on GPTProto.com.

## Overview

- **Endpoint**: `POST https://gptproto.com/v1/images/generations`
- **Model ID**: `flux-kontext-pro`
- **Vendor**: Flux
- **Scene**: `text-to-image`
- **Category**: text-to-image
- **Modalities**: input text → output image
- **Model page**: https://gptproto.com/model/flux/flux-kontext-pro/text-to-image
- **API documentation**: https://docs.gptproto.com
- **Other scenes of this model**: `image-edit` — same auth, different endpoint path and input schema

## Authentication

Every request needs a GPTProto API key. Create one at https://gptproto.com/dashboard/api-key, then export it:

```bash
export GPTPROTO_API_KEY="your-api-key"
```

Header: `Authorization: Bearer YOUR_API_KEY`.

## Pricing

Platform price by tier (USD, already includes the GPTProto discount):

- **Per run** — $0.032 per run

Price range: $0.032 – $0.032 per generation.

Prices may change. The model page always shows the live price: https://gptproto.com/model/flux/flux-kontext-pro/text-to-image

## API Information

The examples below use this model's official request format from the model page. Copy them as-is and replace the API key placeholder.

### Input Schema

The accepted JSON body is the official request shape below:

**Full Example**:

```json
{
  "prompt": "cat with a red hat",
  "model": "flux-kontext-pro",
  "size": "16:9",
  "n": 1
}
```

## Usage Examples

### 1. Submit a request

```bash
curl --request POST "https://gptproto.com/v1/images/generations" \
  --header "Authorization: Bearer YOUR_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
    "prompt": "cat with a red hat",
    "model": "flux-kontext-pro",
    "size": "16:9",
    "n": 1
  }'
```

```python
import os
import requests

url = "https://gptproto.com/v1/images/generations"
headers = {
  "Authorization": "Bearer YOUR_API_KEY",
  "Content-Type": "application/json"
}
payload = {
  "prompt": "cat with a red hat",
  "model": "flux-kontext-pro",
  "size": "16:9",
  "n": 1
}

response = requests.request("POST", url, headers=headers, json=payload)
print(response.json())
```

```typescript
const response = await fetch("https://gptproto.com/v1/images/generations", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    prompt: "cat with a red hat",
    model: "flux-kontext-pro",
    size: "16:9",
    n: 1,
  }),
});

const data = await response.json();
console.log(data);
```

## Example Prompts

- An elderly couple with white hair, wearing cozy sweaters, holding hands and leaning on each other on a park bench in autumn, watching the sunset. The afterglow of the sunset paints their silhouettes in gold, with a path covered in fallen leaves in the background. The scene is tou…
- Professional DSLR photo of a cute corgi dog sitting on a park bench in autumn, with a few maple leaves scattered around. Sunlight comes from the side, creating a warm rim light. The background is a blurry forest with a shallow depth of field. photorealistic, 4k, sharp focus.
- A grand steampunk airship soaring through the sky, with intricate brass and copper details, large propellers spinning, and a massive balloon filled with hot air. The airship is adorned with Victorian-style architecture, featuring ornate railings and decorative elements. The sky i…

## HTTP Status Codes

- `400` — malformed body, a parameter or value this model does not accept, or input blocked by the provider's content moderation
- `401` — missing or invalid API key
- `403` — insufficient credits
- `413` — request body too large
- `429` — rate limited; retry with backoff
- `500` — An internal server error occurred
- `502` — An internal server error occurred
- `504` — Gateway timeout — upstream service did not respond in time; retry later

## Additional Resources

- [Model page](https://gptproto.com/model/flux/flux-kontext-pro/text-to-image)
- [API documentation](https://docs.gptproto.com)
- [All models](https://gptproto.com/model)
- [API keys](https://gptproto.com/dashboard/api-key)
- [Platform overview for LLMs](https://gptproto.com/llm-full.txt)
- Any other model: `https://gptproto.com/model/{vendor}/{model}/{scene}/llms.txt`