ComfyUI Node
arkennemasis fal · Flux Pro v1.1 · $0.04/MP
FLUX1.1 [pro] is an enhanced version of FLUX.1 [pro], improved image generation capabilities, delivering superior composition, detail, and artistic fidelity compared to its predecessor. Pricing (from fal, 2026-09-29): $0.04 per megapixel (fal's billing unit). Model page: https://fal.ai/models/fal-ai/flux-pro/v1.1 Key: FAL_KEY in the .env next to run_nvidia_gpu.bat. Results are saved in output/fal/fal-ai_flux-pro_v1.1/.
arkennemasis fal · Flux Pro v1.1 · $0.04/MP
- images
- image_paths
- seed
- has_nsfw_concepts
- prompt
- timings
- info
◄prompt►
◄image_sizelandscape_4_3►
◄image_size_width1024►
◄image_size_height1024►
◄seed-1►
◄num_images1►
◄output_formatjpeg►
◄safety_tolerance2►
◄enhance_promptfalse►
◄max_cost_usd20.0►
◄reuse_identical_runtrue►
◄extra_json►
◄max_concurrent1►
Categoryarkennemasis/fal/Image/Flux
Inputs (13)
| Name | Type | Default | Description |
|---|---|---|---|
| prompt | STRING | The prompt to generate an image from. | |
| image_size | COMBO | landscape_4_3 | The size of the generated image. 'custom' uses the width and height below. |
| image_size_width | INT | 102416–14142 | Width in pixels when image_size is 'custom'. |
| image_size_height | INT | 102416–14142 | Height in pixels when image_size is 'custom'. |
| seed | INT | -1-1–2147483647 | The same seed and the same prompt given to the same version of the model will output the same image every time. -1 leaves it to the model. |
| num_images | INT | 11–4 | The number of images to generate. |
| output_format | COMBO | jpeg | The format of the generated image. |
| safety_tolerance | COMBO | 2 | The safety tolerance level for the generated image. 1 being the most strict and 5 being the most permissive. |
| enhance_prompt | BOOLEAN | false | Whether to enhance the prompt for better results. |
| max_cost_usdopt | FLOAT | 20.00–100000 | Safety cap. If the estimated cost of this run is above this many US dollars the node stops BEFORE sending anything to fal. 0 = no cap. |
| reuse_identical_runopt | BOOLEAN | true | If these exact inputs (the settings AND the same pictures/clips/audio) were already paid for and the files are still in output/fal, return them instead of paying again - also after a ComfyUI restart. Turn off for a fresh take with the same settings. |
| extra_jsonopt | STRING | Advanced: a JSON object merged into the request last, for any fal field this node has no box for. Example: {"seed": 7}. Leave empty normally. | |
| max_concurrentopt | INT | 11–32 | How many paid fal calls may run at the same time in one run, across every fal node. 1 (default) = one after another. This node starts its paid part only while fewer than this many fal calls are running. Once any fal node fails, the ones still waiting are not started, so nothing more is billed. |
Outputs (7)
| Name | Type | Description |
|---|---|---|
| images | IMAGE | — |
| image_paths | STRING | — |
| seed | INT | — |
| has_nsfw_concepts | STRING | — |
| prompt | STRING | — |
| timings | STRING | — |
| info | STRING | JSON: request id, cost estimate, saved files and fal's full answer. |