flux-txt2img

1# Flux Text-to-Image Workflows
2 
3## Overview
4 
5Flux is a guidance-distilled diffusion model family from Black Forest Labs. It uses a separate `FluxGuidance` node instead of KSampler CFG (which must always be 1.0). Three variants are available locally:
6 
71. **Flux.1 Dev SRPO.** Fine-tuned Flux.1 Dev with SRPO alignment. Uses DualCLIPLoader (T5XXL + CLIP-L). BF16 only.
82. **Flux 2 Klein 9B.** Distilled Flux 2 variant. Uses single CLIPLoader (Qwen3-8B) + `flux2-vae.safetensors`. Fast 4-step generation.
93. **Flux 2 Turbo LoRA.** Applied to Flux.1 Dev for 4-step generation.
10 
11## Models
12 
13### Flux.1 Dev SRPO
14 
15| Component | Node | Model | Notes |
16|-----------|------|-------|-------|
17| **UNET** | `UNETLoader` | `flux.1-dev-SRPO-BFL-bf16.safetensors` | 22.7GB, **BF16 only** — FP8 produces broken results |
18| **CLIP** | `DualCLIPLoader` (type=`flux`) | `clip_name1`: `t5xxl_fp8_e4m3fn.safetensors`, `clip_name2`: `clip_l.safetensors` | T5XXL (4.7GB) + CLIP-L (235MB) |
19| **VAE** | `VAELoader` | `ae.safetensors` | Standard Flux VAE (320MB). Z-Image uses the same VAE *architecture* but different weights — its VAE is a separate file (`z-image-ae.safetensors`), not this one |
20 
21### Flux 2 Klein 9B
22 
23| Component | Node | Model | Notes |
24|-----------|------|-------|-------|
25| **UNET** | `UNETLoader` | `bigLove_klein1.safetensors` | 17.3GB, Klein 9B variant |
26…