> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bfl.ml/llms.txt
> Use this file to discover all available pages before exploring further.
# FLUX1.1 [pro] Image Generation
> Generate images with FLUX1.1 [pro], a fast and reliable text-to-image model with strong prompt adherence and competitive pricing.
**FLUX1.1 \[pro]** is the standard for text-to-image generation with fast, reliable and consistently stunning results.
To generate an image from text, you’ll make a request to the `/flux-pro-1.1` endpoint.
## Key Features
State-of-the-art inference speeds with consistent, stunning results every time
Proven baseline for accurate text-to-image generation that follows your prompts precisely
Robust architecture ideal for high-volume, production-ready image generation
Superior image quality at just \$0.04 per image
## Examples of Image Generation with FLUX.1 \[pro]
## Using FLUX1.1 \[pro] API for Text-to-Image Generation
### Create a Request
Use the `/flux-pro-1.1` endpoint for standard FLUX1.1 \[pro] generation:
```bash create_request.sh theme={null}
request=$(curl -X POST \
'https://api.bfl.ai/v1/flux-pro-1.1' \
-H 'accept: application/json' \
-H "x-key: ${BFL_API_KEY}" \
-H 'Content-Type: application/json' \
-d '{
"prompt": "A futuristic city skyline at sunset with flying cars",
"width": 1024,
"height": 1024
}')
request_id=$(echo $request | jq -r .id)
polling_url=$(echo $request | jq -r .polling_url)
```
```python create_request.py theme={null}
import requests
import os
request = requests.post(
'https://api.bfl.ai/v1/flux-pro-1.1',
headers={
'accept': 'application/json',
'x-key': os.environ.get("BFL_API_KEY"),
'Content-Type': 'application/json',
},
json={
'prompt': 'A futuristic city skyline at sunset with flying cars',
'width': 1024,
'height': 1024
}
).json()
print(request)
request_id = request["id"]
polling_url = request["polling_url"] # Use this URL for polling
```
### Poll for Result
After submitting a request, you need to poll using the returned `polling_url` to retrieve the output when ready.
```bash poll_result.sh theme={null}
while true; do
sleep 0.5
result=$(curl -s -X 'GET' \
"${polling_url}" \
-H 'accept: application/json' \
-H "x-key: ${BFL_API_KEY}")
status=$(echo $result | jq -r .status)
echo "Status: $status"
if [ "$status" == "Ready" ]; then
echo "Result: $(echo $result | jq -r .result.sample)"
break
elif [ "$status" == "Error" ] || [ "$status" == "Failed" ]; then
echo "Generation failed: $result"
break
fi
done
```
```python poll_result.py theme={null}
# This assumes that the `polling_url` variable is set.
import time
import os
import requests
while True:
time.sleep(0.5)
result = requests.get(
polling_url,
headers={
'accept': 'application/json',
'x-key': os.environ.get("BFL_API_KEY"),
}
).json()
if result['status'] == 'Ready':
print(f"Image ready: {result['result']['sample']}")
break
elif result['status'] in ['Error', 'Failed']:
print(f"Generation failed: {result}")
break
```
A successful response will be a JSON object containing the result, and `result['sample']` is a signed URL for retrieval.
Our signed URLs are only valid for 10 minutes. Please retrieve your result within this timeframe.
### FLUX1.1 \[pro] Parameters
| Parameter | Type | Default | Description | Required |
| ------------------- | ------- | ------- | ---------------------------------------------------------------------------------- | -------- |
| `prompt` | string | | Text description of the desired image | **Yes** |
| `width` | integer | 1024 | Image width in pixels | No |
| `height` | integer | 1024 | Image height in pixels | No |
| `prompt_upsampling` | boolean | false | Enhance prompt for better results | No |
| `seed` | integer | null | Seed for reproducible results. Accepts any integer | No |
| `safety_tolerance` | integer | 2 | Content moderation level. Value ranges from 0 (most strict) to 6 (more permissive) | No |
| `output_format` | string | "jpeg" | Desired format of the output image. Can be "jpeg" or "png" | No |
| `webhook_url` | string | null | URL for asynchronous completion notification. Must be a valid HTTP/HTTPS URL | No |
| `webhook_secret` | string | null | Secret for webhook signature verification, sent in the `X-Webhook-Secret` header | No |
## Pricing
FLUX1.1 \[pro] is available at **\$0.04 per image**.