flux-txt2img

# Flux Text-to-Image Workflows ## Overview Flux 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: 1. **Flux.1 Dev SRPO** — Fine-tuned Flux.1 Dev with SRPO alignment. Uses DualCLIPLoader (T5XXL + CLIP-L). BF16 only. 2. **Flux 2 Klein 9B** — Distilled Flux 2 variant. Uses single CLIPLoader (Qwen3-8B) + `flux2-vae.safetensors`. Fast 4-step generation. 3. **Flux 2 Turbo LoRA** — Applied to Flux.1 Dev for 4-step generation. ## Models ### Flux.1 Dev SRPO | Component | Node | Model | Notes | |-----------|------|-------|-------| | **UNET** | `UNETLoader` | `flux.1-dev-SRPO-BFL-bf16.safetensors` | 22.7GB, **BF16 only** — FP8 produces broken results | | **CLIP** | `DualCLIPLoader` (type=`flux`) | `clip_name1`: `t5xxl_fp8_e4m3fn.safetensors`, `clip_name2`: `clip_l.safetensors` | T5XXL (4.7GB) + CLIP-L (235MB) | | **VAE** | `VAELoader` | `ae.safetensors` | Standard Flux/Z-Image VAE (320MB) | ### Flux 2 Klein 9B | Component | Node | Model | Notes | |-----------|------|-------|-------| | **UNET** | `UNETLoader` | `bigLove_klein1.safetensors` | 17.3GB, Klein 9B variant | | **CLIP** | `CLIPLoader` (type=`flux`) | `qwen_3_8b_fp8mixed.safetensors` | Qwen3-8B in text_encoders/ (8.3GB) | | **VAE** | `VAELoader` | `flux2-vae.safetensors` | Flux 2 specific VAE (321MB) | **Klein 9B vs Flux.1 Dev**: Klein uses Qwen3-8B text encoder (not T5XXL ...