Create app.py

app.py

@@ -0,0 +1,49 @@
+import os
+import gradio as gr
+from openai import OpenAI
+
+# ---- Configuration ----
+
+HF_API_KEY = os.getenv("HF_TOKEN")
+
+client = OpenAI(
+    base_url="https://router.huggingface.co/v1",
+    api_key=HF_API_KEY
+)
+
+# ---- Chat function ----
+def chat_with_model(user_message, history):
+    if history is None:
+        history = []
+
+    messages = [{"role": "system", "content": "You are a helpful assistant."}]
+    for human, bot in history:
+        messages.append({"role": "user", "content": human})
+        messages.append({"role": "assistant", "content": bot})
+
+    messages.append({"role": "user", "content": user_message})
+
+    try:
+        completion = client.chat.completions.create(
+            model="openai/gpt-oss-20b:nebius",
+            messages=messages
+        )
+
+        assistant_reply = completion.choices[0].message["content"]
+        history.append((user_message, assistant_reply))
+        return assistant_reply, history
+
+    except Exception as e:
+        return f"Error: {str(e)}", history
+
+
+# ---- Gradio UI ----
+with gr.Blocks() as demo:
+    gr.Markdown("# 🤖 Chatbot using HuggingFace Router (OpenAI API Compatible)")
+    chatbot = gr.Chatbot(height=450)
+    text_input = gr.Textbox(label="Your message")
+
+    text_input.submit(chat_with_model, [text_input, chatbot], [chatbot])
+    text_input.submit(lambda: "", None, text_input)  # clear input
+
+demo.launch()