PixArt-Σ
PixArt-Σ is a released vision model with open-source; evaluate it while provider pricing coverage matures.
Use it for
- Teams evaluating vision
Do not use it for
- Cost-sensitive launches that need sourced token pricing
- Strict JSON or tool-calling flows
- Teams that need a tracked hosted API route today
- Family
- PixArt
- Released
- 2024-03-30
- Parameters
- 600M
- Architecture
- Diffusion Transformer
- Specialization
- image-generation
- Openness
- Open source
- License
- Apache 2.0OSI-approvedCommercial use: permitted
No tracked provider token pricing is available yet.
About
PixArt-Σ (Sigma) by Huawei Noah's Ark Lab. A 600M-parameter Diffusion Transformer capable of generating images at up to 4K (3840×2560) resolution without an upscaler. Uses 'weak-to-strong training' on higher-quality data. Competitive with Adobe Firefly 2, Imagen 2, and DALL-E 3 at a fraction of the parameter count. Open source under Apache 2.0. Available via Fal API (fal-ai/pixart-sigma).
PixArt-Σ is an open-source model in the PixArt family. The structured metadata tracks multimodal input. No headline benchmark score is tracked for PixArt-Σ yet.
Top use-case fit
Vision
Included by capability and metadata signals in the decision map.
Provider price ladder
No tracked provider token pricing is available for this model yet.
Capabilities
Benchmark peer barsfor Vision
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
No tracked provider token pricing is available yet.