# FLUX.1 Krea [dev]

> Run FLUX.1 Krea [dev] by infsh online or via API. Pay per run, no setup.

**URL:** https://inference.sh/apps/infsh/flux-1-krea-dev
**Last updated:** 2026-03-12

---

A tool for generating images from text descriptions, available for non-commercial use.

- app: `infsh/flux-1-krea-dev`
- maker: [infsh](https://inference.sh/apps/infsh.md)
- category: [image](https://inference.sh/apps/category/image.md)
- runs via: api, javascript and python sdk, belt cli, mcp

## flux-1-krea-dev API Guide

### About
a tool for generating images from text descriptions, available for non-commercial use.

### 1. Calling the API

#### Install the Client

```bash
pip install inferencesh
```

#### Setup Your API Key
Set `INFERENCE_API_KEY` as an environment variable. Get your key from settings → api keys.

```bash
export INFERENCE_API_KEY="inf_your_key"
```

#### Run and Get Result

```python
import os
from inferencesh import inference

client = inference(api_key=os.environ["INFERENCE_API_KEY"])


result = client.run({
        "app": "infsh/flux-1-krea-dev@46swd2g9",
        "input": {
            "prompt": "prompt"
        }
    })

print(result["output"])
```

#### Stream Live Updates

```python
import os
from inferencesh import inference

client = inference(api_key=os.environ["INFERENCE_API_KEY"])


## stream=True yields updates as they arrive
for update in client.run({
        "app": "infsh/flux-1-krea-dev@46swd2g9",
        "input": {
            "prompt": "prompt"
        }
    }, stream=True):
    if update.get("progress"):
        print(f"progress: {update['progress']}%")
    if update.get("output"):
        print(f"output: {update['output']}")
```

### 2. Authentication
The API uses API keys for authentication. See the authentication docs for detailed setup instructions.

### 3. Files

#### Automatic Upload

```python
## local file paths are automatically uploaded
result = client.run({
    "app": "infsh/flux-1-krea-dev@46swd2g9",
    "input": {
        "image": "/path/to/local/image.png",  # detected & uploaded
        "audio": "https://example.com/audio.mp3",  # url passed through
    }
})
```

#### Manual Upload

```python
## upload and get a hosted URL
file = client.files.upload("/path/to/file.png")
print(file.uri)  # https://cloud.inference.sh/...
```

### 4. Schema

#### Input
- **prompt** (string) *required*: The text prompt to generate an image from.
- **height** (integer): The height in pixels of the generated image.
- **width** (integer): The width in pixels of the generated image.
- **num_inference_steps** (integer): The number of inference steps.
- **guidance_scale** (number): The guidance scale.
- **seed** (integer): The seed for random generation.
- **loras** (array): List of LoRA configs to apply
- **scheduler** (string): Scheduler to use for diffusion process.
- **denoise** (number): Denoising strength (0.0 to 1.0, where 1.0 is standard full denoising)

#### Output
- **image_output** (object): The generated image.

## other image apps

- [Gemini Nano Banana 2.1](https://inference.sh/apps/google/gemini-nano-banana-2-1.md): $1.50/M input, $0.0336–$0.1134/image (1K–4K), +$0.014/query Google Search
- [Grok Imagine Image 2.0](https://inference.sh/apps/xai/grok-imagine-image-2-0.md): $0.04/img low 1k, $0.06/img low 2k, $0.06/img med 1k, $0.08/img med 2k; $0.01/source img (edits)
- [GPT Image 2.5 Sunburst](https://inference.sh/apps/openai/gpt-image-2-5-sunburst.md): $0.006-$0.21 per 1024x1024 image: low $0.006, medium $0.013, high $0.053, xhigh $0.094, max $0.21. Larger sizes cost more; edits add ~$0.008 per reference image.
- [GPT Image 2.5 Flare](https://inference.sh/apps/openai/gpt-image-2-5-flare.md): $0.006-$0.21/image at 1024x1024: low $0.0059, medium $0.0132, high $0.0527, xhigh $0.0937, max $0.2107. Larger sizes cost more; edits add ~$0.0083 per reference image.
- [Image Resize & Crop](https://inference.sh/apps/eval/resize.md): from $0.00000277/sec

## faq

### how much does FLUX.1 Krea [dev] cost?

you pay per run from your inference shell credits, and the app shows its cost before each run. no subscription is required.

### how do I run FLUX.1 Krea [dev] via api?

call infsh/flux-1-krea-dev with the javascript or python sdk, the rest api, or `belt app run infsh/flux-1-krea-dev` from a terminal. the api reference on this page lists every input.

### who makes FLUX.1 Krea [dev]?

FLUX.1 Krea [dev] is made by infsh and runs on inference shell. every infsh app is listed at https://inference.sh/apps/infsh.

### can my agent use FLUX.1 Krea [dev]?

yes. agents call it as a tool through the inference shell mcp server (https://api.inference.sh/mcp), the belt cli or the sdk, and pay per run like you do.

### what are the alternatives to FLUX.1 Krea [dev]?

other image apps on inference shell include Gemini Nano Banana 2.1, Grok Imagine Image 2.0, GPT Image 2.5 Sunburst, GPT Image 2.5 Flare. they run through the same api, so switching is a one-line change.