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bytedance/flux-pulid

⚡️FLUX PuLID: FLUX-dev based Pure and Lightning ID Customization via Contrastive Alignment🎭

Capabilities

1:1 4:3 3:4 16:9 9:16 2:3 3:2 Negative Prompt Seed

Cost

Community model (estimated from hardware time)

Input Parameters

main_face_image required string

Upload an ID image for face generation

guidance_scale number

Set the guidance scale for text prompt influence (1.0-10.0)

Default: 4 min: 1, max: 10
height integer

Set the height of the generated image (256-1536 pixels)

Default: 1152 min: 256, max: 1536
id_weight number

Set the weight of the ID image influence (0.0-3.0)

Default: 1 min: 0, max: 3
max_sequence_length integer

Set the max sequence length for prompt (T5), smaller is faster (128-512)

Default: 128 min: 128, max: 512
negative_prompt string

Enter a negative prompt to specify what to avoid in the image

Default: "bad quality, worst quality, text, signature, watermark, extra limbs, low resolution, partially rendered objects, deformed or partially rendered eyes, deformed, deformed eyeballs, cross-eyed, blurry"
num_outputs integer

Set the number of images to generate (1-4)

Default: 1 min: 1, max: 4
num_steps integer

Set the number of denoising steps (1-20)

Default: 20 min: 1, max: 20
output_format string

Choose the format of the output image

Default: "webp"
png jpg webp
output_quality integer

Set the quality of the output image for jpg and webp (1-100)

Default: 80 min: 1, max: 100
prompt string

Enter a text prompt to guide image generation

Default: "portrait, color, cinematic"
seed integer

Set a random seed for generation (leave blank or -1 for random)

start_step integer

Set the timestep to start inserting ID (0-4 recommended, 0 for highest fidelity, 4 for more editability)

Default: 0 min: 0, max: 10
true_cfg number

Set the Classifier-Free Guidance (CFG) scale. 1.0 uses standard CFG, while values >1.0 enable True CFG for more precise control over generation. Higher values increase adherence to the prompt at the cost of image quality.

Default: 1 min: 1, max: 10
width integer

Set the width of the generated image (256-1536 pixels)

Default: 896 min: 256, max: 1536
Version: 8baa7ef22550 Updated: 2/26/2026 2.5M runs