Since we've been on image generation, here are the main free image models — grouped by how you'd access them.
Free via NVIDIA NIM (build.nvidia.com)
These work with the exact same PowerShell/curl pattern I gave you — just swap the endpoint:
| Model | Endpoint slug | Notes |
|---|---|---|
| FLUX.1 [dev] | black-forest-labs/flux.1-dev |
Top-tier quality, great prompt adherence |
| FLUX.1 [schnell] | black-forest-labs/flux.1-schnell |
Much faster, fewer steps (~4) |
| Stable Diffusion 3.5 Large | stabilityai/stable-diffusion-3.5-large |
Strong all-rounder |
| SDXL | stabilityai/stable-diffusion-xl |
Older but reliable, lots of community LoRAs |
| SDXL Turbo | stabilityai/sdxl-turbo |
Real-time / single-step generation |
Free to run locally (open weights, on your NVIDIA GPU)
Fully free, unlimited, private — just needs VRAM:
- FLUX.1 [schnell] — Apache-2.0 licensed, the most permissive top model
- Stable Diffusion 3.5 Medium / Large — runs well on 8–12GB VRAM (medium)
- SDXL / SDXL-Lightning — light, fast, huge ecosystem
- SD 1.5 — ancient by now but tiny, runs on almost anything
- Playground v2.5 — aesthetically tuned, open weights
- Kandinsky 3 — open, good stylized output
Quick recommendation
| Goal | Pick |
|---|---|
| Best quality, free, no GPU | FLUX.1-dev via NVIDIA NIM |
| Fastest results | FLUX.1-schnell or SDXL-Turbo |
| Unlimited + private | FLUX.1-schnell locally (Apache license) |
| Zero setup, zero key | Pollinations.ai |
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