Quickstart: Flux LoRA Inference

Together AI now provides a high-speed endpoint for the FLUX.1 [dev] model with integrated LoRA support. This enables swift and high-quality image generation using pre-trained LoRA adaptations for personalized outputs, unique styles, brand identities, and product-specific visualizations.

Fine-tuning for FLUX LoRA is not yet available.

Generating an image using Flux LoRAs

Some Flux LoRA fine-tunes need to be activated using a trigger phrases that can be used in the prompt and can typically be found in the model cards. For example with: https://huggingface.co/multimodalart/flux-tarot-v1, you should use in the style of TOK a trtcrd tarot style to trigger the image generation.

You can add up to 2 LoRAs per image to combine the style from the different fine-tunes. The scale parameter allows you to specify the strength of each LoRA. Typically values of 0.3-1.2 will produce good results.

Python

from together import Together

client = Together()
response = client.images.generate(
    prompt="a BLKLGHT image of man walking outside on rainy day",
    model="black-forest-labs/FLUX.1-dev-lora",
    width=1024,
    height=768,
    steps=28,
    n=1,
    response_format="url",
    image_loras=[
        {"path": "https://replicate.com/fofr/flux-black-light", "scale": 0.8},
        {
            "path": "https://huggingface.co/XLabs-AI/flux-RealismLora",
            "scale": 0.8,
        },
    ],
)
print(response.data[0].url)

Acceptable LoRA URL formats

You can point to any URL that has a .safetensors file with a valid Flux LoRA fine-tune.

Format	Example
HuggingFace Repo Link	https://huggingface.co/multimodalart/flux-tarot-v1
HuggingFace Direct File Link with “resolve”*	https://huggingface.co/XLabs-AI/flux-lora-collection/resolve/main/anime_lora.safetensors
Civit Download Link	https://civitai.com/api/download/models/913438?type=Model&format=SafeTensor
Replicate Fine-tuned Flux Model Link	https://replicate.com/fofr/flux-black-light
Replicate Fine-tuned Flux Version Link	https://replicate.com/fofr/flux-black-light/versions/d0d48e298dcb51118c3f903817c833bba063936637a33ac52a8ffd6a94859af7
Direct file link ending with “.safetensors”	https://mybucket.s3.amazonaws.com/my_special_lora.safetensors

*Note: the HuggingFace web page for a file (https://huggingface.co/XLabs-AI/flux-lora-collection/blob/main/anime_lora.safetensors) will NOT work

If the safetensors file has incompatible keys, you’ll get the message ” has unused keys <keys…>”. This will happen if you pass a finetune of a non-flux model or an otherwise invalid file.

Examples

The example below produces a realistic tarot card of a panda:

Python

prompt = "a baby panda eating bamboo in the style of TOK a trtcrd tarot style"

response = client.images.generate(
    prompt=prompt,
    model="black-forest-labs/FLUX.1-dev-lora",
    width=1024,
    height=768,
    steps=28,
    n=1,
    response_format="url",
    image_loras=[
        {
            "path": "https://huggingface.co/multimodalart/flux-tarot-v1",
            "scale": 1,
        },
        {
            "path": "https://huggingface.co/Shakker-Labs/FLUX.1-dev-LoRA-add-details",
            "scale": 0.8,
        },
    ],
)

Pricing

Your request costs $0.035 per megapixel. For $1, you can run this model approximately 29 times. Image charges are calculated by rounding up to the nearest megapixel.

Note: Due to high demand, FLUX.1 [schnell] Free has a model specific rate limit of 10 img/min. Flux Pro 1 and Flux Pro 1.1 are limited to users Build Tier 2 and above.