Use models actually available on free HF API

app.py

@@ -60,10 +60,12 @@ STYLES = {
 }
 
 # Models available on HF Inference API (free tier)
+# Note: Phi-3, Gemma, Qwen from our experiments are NOT on free API
+# Using similar instruction-tuned models that ARE available
 MODELS = {
-    'Mistral-7B (proxy for Phi-3)': 'mistralai/Mistral-7B-Instruct-v0.3',
-    'Qwen2.5-72B': 'Qwen/Qwen2.5-72B-Instruct',
-    'Llama-3.1-8B': 'meta-llama/Llama-3.1-8B-Instruct',
+    'Zephyr-7B': 'HuggingFaceH4/zephyr-7b-beta',
+    'Mistral-7B': 'mistralai/Mistral-7B-Instruct-v0.2',
+    'Falcon-7B': 'tiiuae/falcon-7b-instruct',
 }
 
 # Initialize client
@@ -197,8 +199,8 @@ with gr.Blocks(title="Unicode Attack Demo", theme=gr.themes.Soft()) as demo:
                 model_dropdown = gr.Dropdown(
                     choices=list(MODELS.keys()),
                     label="Model",
-                    value="Mistral-7B (proxy for Phi-3)",
-                    info="Demo uses similar-sized models available on free API"
+                    value="Zephyr-7B",
+                    info="Note: Original models (Phi-3, Gemma, Qwen) not on free API"
                 )
                 task_dropdown = gr.Dropdown(
                     choices=["Fact Verification", "Argument Mining"],