ComfyUI Node
arkennemasis fal · Flux Pro v1 Fill Finetuned · $0.06/MP
FLUX.1 [pro] Fill Fine-tuned is a high-performance endpoint for the FLUX.1 [pro] model with a fine-tuned LoRA that enables rapid transformation of existing images, delivering high-quality style transfers and image modifications with the core FLUX capabilities. Pricing (from fal, 2026-09-30): $0.06 per megapixel (fal's billing unit). Model page: https://fal.ai/models/fal-ai/flux-pro/v1/fill-finetuned Key: FAL_KEY in the .env next to run_nvidia_gpu.bat. Results are saved in output/fal/fal-ai_flux-pro_v1_fill-finetuned/.
arkennemasis fal · Flux Pro v1 Fill Finetuned · $0.06/MP
- image
- mask
- images
- image_paths
- seed
- has_nsfw_concepts
- prompt
- timings
- info
◄prompt►
◄seed-1►
◄num_images1►
◄output_formatjpeg►
◄safety_tolerance2►
◄enhance_promptfalse►
◄finetune_id►
◄finetune_strength0.00►
◄max_cost_usd20.0►
◄reuse_identical_runtrue►
◄extra_json►
◄max_concurrent1►
Categoryarkennemasis/fal/Image/Flux
Inputs (14)
| Name | Type | Default | Description |
|---|---|---|---|
| prompt | STRING | The prompt to fill the masked part of the image. | |
| 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. |
| image | IMAGE | The image URL to generate an image from. Needs to match the dimensions of the mask. | |
| mask | MASK | The mask URL to inpaint the image. Needs to match the dimensions of the input image. | |
| finetune_id | STRING | References your specific model | |
| finetune_strength | FLOAT | 0.000–2 | Controls finetune influence. Increase this value if your target concept isn't showing up strongly enough. The optimal setting depends on your finetune and prompt |
| 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. |