FLUX.1 [dev]
12B parameter open-weight diffusion model.
Open Source 8–24 GB VRAM
- Min VRAM
- 8 GB
- GPU class
- High-end GPU
- Quant
- FP16
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Visit Stable Diffusion 3.5 LargeUpdated 2026-03-18 · Direct link
Hardware requirements
Runs locally · Mid GPU (12 GB)
Min VRAM
12 GB
Rec. VRAM
24 GB
Min RAM
16 GB
Rec. RAM
32 GB
Disk
20 GB
GPU class
Mid GPU
11.8+Apple Silicon ✓GPU RequiredQuant: FP16, FP8, GGUF
FP8 fits in 12 GB; FP16 comfortable at 24 GB.
Screenshot placeholder · Stable Diffusion 3.5 Large
What is Stable Diffusion 3.5 Large?
SD 3.5 Large is the model Stability shipped after the SD3 launch missteps. 8B MMDiT params, dramatically improved prompt adherence over SDXL, and the Community Licence is workable for most uses (revenue cap before commercial licence kicks in). The OSS counterweight to Flux in 2025+.
Pros & cons
Pros
- Best-in-class typography and text rendering
- Strong prompt adherence vs. SDXL
- Multi-aspect-ratio out of the box (no upscaling required)
- MMDiT shares architecture with Flux — workflows transfer
Cons
- Heavier than SDXL — 12 GB VRAM floor in FP8
- Community Licence has a revenue threshold; not strictly OSI-OSS
What's actually free?
Stability AI Community License — free up to $1M annual revenue.
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Alternatives
Flux.1 Schnell
Black Forest Labs' 4-step distilled Flux.
Open Source 8–16 GB VRAM
- Min VRAM
- 8 GB
- GPU class
- Mid GPU
- Quant
- FP16
Actually FreeNo SignupOpen SourceWatermark-Free
Stable Diffusion XL
The workhorse open-weight image model.
Open Source 6–12 GB VRAM
- Min VRAM
- 6 GB
- GPU class
- Mid GPU
- Quant
- FP16
Actually FreeNo SignupOpen SourceWatermark-Free