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How to train a FLUX.2 LoRA (dev)

Which trainers support FLUX.2 dev (32B), how much VRAM you need, and settings that are known to work. Every row links to its source.

Trainer support

VRAM

80 GB recommended; ai-toolkit ships train_lora_flux_24gb.yaml

Known-good settings

• Start from ai-toolkit train_lora_flux_24gb.yaml

Where to rent a GPU

See cheapest GPU to train a LoRA (RunPod, Vast.ai).

Sources

• sanj.dev/post/onetrainer-vs-kohya-ss-vs-ai-toolkit/
• github.com/nerogar/OneTrainer
• github.com/ostris/ai-toolkit#readme
• github.com/kohya-ss/musubi-tuner#readme
• github.com/bghira/SimpleTuner#readme

Data updated 2026-10-16. Some provider links may be referral links. unknown = not yet verified.