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black-forest-labs/flux-dev-lora
A version of flux-dev, a text to image model, that supports fast fine-tuned lora inference
Capabilities
Cost
Community model (estimated from hardware time)
Input Parameters
| Name | Type | Description | Default | Constraints |
|---|---|---|---|---|
prompt * | string | Prompt for generated image | — | — |
aspect_ratio | string | Aspect ratio for the generated image | "1:1" | 1:1 16:9 21:9 3:2 2:3 4:5 5:4 3:4 4:3 9:16 9:21 |
civitai_api_token | string (password) | Civitai API token. If you're using a civitai lora that needs authentication, you'll need to provide an API token. | — | — |
disable_safety_checker | boolean | Disable safety checker for generated images. | false | — |
extra_lora | string | Load LoRA weights. Supports Replicate models in the format <owner>/<username> or <owner>/<username>/<version>, HuggingFace URLs in the format huggingface.co/<owner>/<model-name>, CivitAI URLs in the format civitai.com/models/<id>[/<model-name>], or arbitrary .safetensors URLs from the Internet. For example, 'fofr/flux-pixar-cars' | — | — |
extra_lora_scale | number | Determines how strongly the extra LoRA should be applied. Sane results between 0 and 1 for base inference. For go_fast we apply a 1.5x multiplier to this value; we've generally seen good performance when scaling the base value by that amount. You may still need to experiment to find the best value for your particular lora. | 1 | min: -1, max: 3 |
go_fast | boolean | Run faster predictions with model optimized for speed (currently fp8 quantized); disable to run in original bf16. Note that outputs will not be deterministic when this is enabled, even if you set a seed. | true | — |
guidance | number | Guidance for generated image | 3 | min: 0, max: 10 |
hf_api_token | string (password) | HuggingFace API token. If you're using a hf lora that needs authentication, you'll need to provide an API token. | — | — |
image | string (uri) | Input image for image to image mode. The aspect ratio of your output will match this image | — | — |
lora_scale | number | Determines how strongly the main LoRA should be applied. Sane results between 0 and 1 for base inference. For go_fast we apply a 1.5x multiplier to this value; we've generally seen good performance when scaling the base value by that amount. You may still need to experiment to find the best value for your particular lora. | 1 | min: -1, max: 3 |
lora_weights | string | Load LoRA weights. Supports Replicate models in the format <owner>/<username> or <owner>/<username>/<version>, HuggingFace URLs in the format huggingface.co/<owner>/<model-name>[/<lora-weights-file.safetensors>], CivitAI URLs in the format civitai.com/models/<id>[/<model-name>], or arbitrary .safetensors URLs from the Internet, including signed URLs. For example, 'fofr/flux-pixar-cars'. Civit AI and HuggingFace LoRAs may require an API token to access, which you can provide in the `civitai_api_token` and `hf_api_token` inputs respectively. | — | — |
megapixels | string | Approximate number of megapixels for generated image | "1" | 1 0.25 |
num_inference_steps | integer | Number of denoising steps. Recommended range is 28-50, and lower number of steps produce lower quality outputs, faster. | 28 | min: 1, max: 50 |
num_outputs | integer | Number of outputs to generate | 1 | min: 1, max: 4 |
output_format | string | Format of the output images | "webp" | webp jpg png |
output_quality | integer | Quality when saving the output images, from 0 to 100. 100 is best quality, 0 is lowest quality. Not relevant for .png outputs | 80 | min: 0, max: 100 |
prompt_strength | number | Prompt strength when using img2img. 1.0 corresponds to full destruction of information in image | 0.8 | min: 0, max: 1 |
seed | integer | Random seed. Set for reproducible generation | — | — |
prompt required string Prompt for generated image
aspect_ratio string Aspect ratio for the generated image
"1:1" civitai_api_token string Civitai API token. If you're using a civitai lora that needs authentication, you'll need to provide an API token.
disable_safety_checker boolean Disable safety checker for generated images.
false extra_lora string Load LoRA weights. Supports Replicate models in the format <owner>/<username> or <owner>/<username>/<version>, HuggingFace URLs in the format huggingface.co/<owner>/<model-name>, CivitAI URLs in the format civitai.com/models/<id>[/<model-name>], or arbitrary .safetensors URLs from the Internet. For example, 'fofr/flux-pixar-cars'
extra_lora_scale number Determines how strongly the extra LoRA should be applied. Sane results between 0 and 1 for base inference. For go_fast we apply a 1.5x multiplier to this value; we've generally seen good performance when scaling the base value by that amount. You may still need to experiment to find the best value for your particular lora.
1 min: -1, max: 3 go_fast boolean Run faster predictions with model optimized for speed (currently fp8 quantized); disable to run in original bf16. Note that outputs will not be deterministic when this is enabled, even if you set a seed.
true guidance number Guidance for generated image
3 min: 0, max: 10 hf_api_token string HuggingFace API token. If you're using a hf lora that needs authentication, you'll need to provide an API token.
image string Input image for image to image mode. The aspect ratio of your output will match this image
lora_scale number Determines how strongly the main LoRA should be applied. Sane results between 0 and 1 for base inference. For go_fast we apply a 1.5x multiplier to this value; we've generally seen good performance when scaling the base value by that amount. You may still need to experiment to find the best value for your particular lora.
1 min: -1, max: 3 lora_weights string Load LoRA weights. Supports Replicate models in the format <owner>/<username> or <owner>/<username>/<version>, HuggingFace URLs in the format huggingface.co/<owner>/<model-name>[/<lora-weights-file.safetensors>], CivitAI URLs in the format civitai.com/models/<id>[/<model-name>], or arbitrary .safetensors URLs from the Internet, including signed URLs. For example, 'fofr/flux-pixar-cars'. Civit AI and HuggingFace LoRAs may require an API token to access, which you can provide in the `civitai_api_token` and `hf_api_token` inputs respectively.
megapixels string Approximate number of megapixels for generated image
"1" num_inference_steps integer Number of denoising steps. Recommended range is 28-50, and lower number of steps produce lower quality outputs, faster.
28 min: 1, max: 50 num_outputs integer Number of outputs to generate
1 min: 1, max: 4 output_format string Format of the output images
"webp" output_quality integer Quality when saving the output images, from 0 to 100. 100 is best quality, 0 is lowest quality. Not relevant for .png outputs
80 min: 0, max: 100 prompt_strength number Prompt strength when using img2img. 1.0 corresponds to full destruction of information in image
0.8 min: 0, max: 1 seed integer Random seed. Set for reproducible generation
ae0d7d645446 Updated: 2/26/2026 5.7M runs