Flux 2 LoRA Trainer
Train a LoRA on Flux 2 Klein 9B or the full-size Flux 2 Dev. Pick the model you want to generate with: a LoRA only works on the model it was trained on.
1. Choose what to train
2. Add your images
Zip File Upload
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Multiple Images
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Start With One Image
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Frequently Asked Questions
Flux 2 is BFL's latest image model offering enhanced realism, crisper and more accurate text generation, and native image editing capabilities. Training LoRAs on it allows you to customize it for your specific style or subject.
Flux 2 Klein 9B trains in about 14 minutes per 1000 steps on the smaller Flux 2 model, and your LoRA runs on Flux 2 Klein 9B + LoRA. Flux 2 Dev trains the full-size model for the most detail and likeness, takes about 70 minutes per 1000 steps, and runs on Flux 2 Dev + LoRA. A LoRA only works on the model it was trained on, so pick the one you want to generate with.
10+ high-quality images work well. The zip upload supports optional .txt caption files for each image. For single image training, we auto-generate variations.
Flux 2 offers improved text rendering, better image quality, and enhanced realism compared to the original Flux models.
Flux 2 Klein 9B training costs 160 credits per 1000 steps and Flux 2 Dev training costs 110 credits per 1000 steps, charged for the steps you pick (500 steps is half that, 2000 steps double).