FLUX1.1 [pro]
FLUX1.1 Pro is a hosted image-generation model from the earlier FLUX family. It supports text prompts and optional image prompts through Redux conditioning.
Model details
Width and height range from 256 to 1,440 pixels and must be multiples of 32. Optional prompt upsampling expands the text before generation. The model is served through the flux-pro-1.1 endpoint.FLUX1.1 [pro] official documentation
Practical use
Practical guidance. Use this endpoint for existing workflows that need its specific output behavior. Check the exact delivery dimensions before placing the image in a layout. An image prompt guides generation, so do not treat it as a promise to preserve every source pixel.
Ultra and Raw modes
FLUX1.1 Pro Ultra is a hosted image-generation variant with optional Raw mode and image remixing. Raw mode aims for a less processed photographic appearance.FLUX1.1 [pro] Ultra official documentation
The API supports aspect ratios from 21:9 through 9:21. An image prompt can be mixed with the text prompt using an explicit strength setting. Raw is a mode of this endpoint rather than a separate downloadable model.FLUX1.1 [pro] Ultra official documentation
Specifications & access
| Detail | Value and conditions |
|---|---|
| Access | API, Provider product |
| Model identifiers | flux-pro-1.1flux-pro-1.1-ultra |
| Access terms | Proprietary hosted API; no public weights for this variant verified.FLUX1.1 [pro] official documentation |