Everything we have verified about training FLUX.2 klein (4B) LoRAs: which trainers support it, VRAM, settings and where to rent a GPU.
| Trainer | Status |
|---|---|
| ai-toolkit | supported (klein base 4B and 9B) |
| OneTrainer | supported |
| musubi-tuner | supported |
| kohya sd-scripts | unknown |
| SimpleTuner | unknown (Flux.2 listed; variant not stated) |
12-16 GB
No verified settings yet.
Full guide with recipes: How to train a FLUX.2 klein LoRA.
Cheapest 16 GB+ cards (2026-10-16 14:43 UTC) from RunPod and Vast.ai. Prices move constantly; see the live price table.
| GPU | VRAM | RunPod community $/hr | Vast.ai cheapest $/hr |
|---|---|---|---|
| RTX A4000 | 16 GB | $0.17 | $0.09 |
| Tesla V100 | 16 GB | $0.19 | $0.10 |
| RTX 3090 | 24 GB | $0.22 | $0.12 |
| RTX 5060 Ti | 16 GB | — | $0.12 |
| RTX 5070 Ti | 16 GB | — | $0.12 |
| RTX A5000 | 24 GB | $0.16 | — |
ai-toolkit, OneTrainer, musubi-tuner
12-16 GB
Data updated 2026-10-16. Disclosure: RunPod and Vast.ai links are referral links; ImageLoRA may earn a commission at no cost to you. unknown = not yet verified from a source.