`DPMSolverSinglestepScheduler` used is DPM++ second order single step.

SDE for `DPMSolverSinglestepScheduler` is not supported yet. But probably soon: https://github.com/huggingface/diffusers/pull/8269

README.md

@@ -40,7 +40,7 @@ Introducing the new fast model SDXL Flash, we learned that all fast XL models wo
 ### Optimal settings
 - **Steps**: 6-9
 - **CFG Scale**: 2.5-3.5
-- **Sampler**: DPM++ SDE
+- **Sampler**: DPM++ 2S
 
 ### Diffusers usage