What is FLUX.1? 2026 Black Forest Labs Image Model Deep Technical Turkish Guide

## 1. Introduction BFL was founded March 2024 by ex-Stability AI Stable Diffusion creators Robin Rombach, Andreas Blattmann, Dominik Lorenz, Patrick Esser. Seed of $31M from Andreessen Horowitz. FLUX.1 released August 2024, immediately competitive with Midjourney and DALL-E 3. ## 2. Architecture Rectified Flow Transformer: DiT (Diffusion Transformer) backbone with flow matching training. 12B parameters. CLIP-L + T5-XXL dual text encoders (5B T5 enables 512+ token prompts and multilingual fluency). 57 transformer blocks, 24 attention heads, 3072 hidden dim, RoPE positions. ## 3. Variants - **FLUX.1 [schnell]:** Apache 2.0, 1-4 steps, free + commercial, edge - **FLUX.1 [dev]:** Non-commercial, 28-50 steps, research - **FLUX.1 [pro]:** API only, premium - **FLUX 1.1 [pro]:** 6x faster than [pro], same price - **FLUX 1.1 [pro] Ultra:** 4 megapixel, $0.06/image - **FLUX 1.1 [pro] Raw:** Photoreal portrait, less stylized ## 4. Benchmark ELO scores: FLUX 1.1 [pro] Ultra 1135 > Midjourney V6.1 1051 > DALL-E 3 1027 > FLUX [dev] 1013 > SD 3 Large 970 > SDXL 910. Industry leader for human anatomy, text-in-image, and spatial relationships. ## 5. Installation ComfyUI + FLUX [dev]: download flux1-dev.safetensors (23.8GB), VAE, T5-XXL (FP16 9.8GB or FP8 4.9GB), CLIP-L. Run with example workflow. 28 steps ~15 sec on RTX 4090. GGUF Q4_K_M for 12GB VRAM: ~7GB model, ~30-60 sec/image on RTX 3060 12GB. NF4 for 8GB VRAM. ## 6. Prompt Engineering Natural language (long, descriptive) — opposite of SD tag-based. No negative prompts (CFG=1.0). T5-XXL handles 512+ tokens. ## 7. KVKK for Turkish Companies - Bank/defense: Self-host Schnell (Apache 2.0, air-gapped) - E-commerce/marketing: Mistral Le Chat (€15/mo, KVKK Frankfurt) - Freelancer: Replicate/Together API ($0.003-0.05/image) ## 8. Conclusion FLUX.1 is the AI image-gen photorealism + detail leader. 4 variants cover all use cases. For Turkish users: Mistral Le Chat (EU + KVKK) or self-host Schnell + ComfyUI (free + 100% KVKK).