Module 1 · Lesson 1
Flux & SDXL Setup
Pick Your Base Model First (October 2026)
Every later lesson depends on one decision: the image model you build your character on. A LoRA only works on the model family it was trained for, and the model's licence decides whether you may use it on a paid account. Choose before you train anything.
- 01Choose the base model
Before you train anything
- 02Check its licence
It decides whether you may use the model on a paid account
- 03Build on that family
A LoRA only works on the model family it was trained for
| Model | Licence | Paid-account use | VRAM (vendor or Comfy figure) | Strength |
|---|---|---|---|---|
| FLUX.2 [klein] 4B | Apache 2.0 | Yes | About 8-13 GB | Fast photoreal images and multi-reference editing |
| Z-Image Turbo (6B) | Apache 2.0 | Yes | Fits in 16 GB | Fast photoreal drafts in 8 steps |
| Qwen-Image / Qwen-Image-Edit (20B) | Apache 2.0 | Yes | About 24 GB in fp8 | Instruction editing, text in images |
| SDXL 1.0 and fine-tunes | CreativeML Open RAIL++-M; fine-tunes set their own terms | Yes, within its use restrictions | 8 GB | Largest LoRA and ControlNet library |
| FLUX.1 [dev] (12B) | FLUX.1 [dev] Non-Commercial | Unclear: the model is non-commercial, its outputs may be used commercially; read the licence | About 23 GB file | Large existing LoRA ecosystem |
| FLUX.2 [dev] (32B) | FLUX Non-Commercial | Unclear: the model is non-commercial, its outputs may be used commercially; read the licence | H100-class unless quantized | Top open-weight quality, for testing |
Sources: model cards for FLUX.2 [klein] 4B, Z-Image-Turbo, SDXL and the FLUX.1 [dev] licence.
- FLUX Non-Commercial licences
- Paid-account use unclear: the model is non-commercial, its outputs may be used commercially
- Read the licence before you rely on it
- FLUX.2 [klein] 4B, Z-Image Turbo, Qwen-Image: Apache 2.0, paid use yes
- SDXL 1.0: CreativeML Open RAIL++-M, yes within its use restrictions
- VRAM: about 8-13 GB for FLUX.2 [klein] 4B, 8 GB for SDXL
Source: Model cards and the FLUX.1 [dev] licence
