Switch to SDXL base model for better InferenceClient compatibility

app.py

@@ -8,8 +8,8 @@ from huggingface_hub import InferenceClient
 app = FastAPI(title="ImageGen API")
 
 # Choose a model that supports text->image via Inference API.
-# SDXL Turbo is fast; you can swap for other models later.
-MODEL_ID = os.getenv("MODEL_ID", "stabilityai/sdxl-turbo")
+# Using a model that works well with InferenceClient
+MODEL_ID = os.getenv("MODEL_ID", "stabilityai/stable-diffusion-xl-base-1.0")
 HF_TOKEN = os.getenv("HF_TOKEN")  # set in Space Secrets
 client = InferenceClient(model=MODEL_ID, token=HF_TOKEN)
 
@@ -33,7 +33,7 @@ def generate(req: GenReq):
             width=req.width,
             height=req.height,
             seed=req.seed,
-            num_inference_steps=req.num_inference_steps or 1  # SDXL Turbo works best with 1 step
+            num_inference_steps=req.num_inference_steps or 20  # SDXL works well with 20 steps
         )
         buf = io.BytesIO()
         img.save(buf, format="PNG")