app.py

# 2) The actual app
import os
from getpass import getpass
from openai import OpenAI
import gradio as gr

# ——— Configure your OpenRouter key ———
if "OPENROUTER_API_KEY" not in os.environ or not os.environ["OPENROUTER_API_KEY"]:
    os.environ["OPENROUTER_API_KEY"] = getpass("🔑 Enter your OpenRouter API key: ")

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key=os.environ["OPENROUTER_API_KEY"],
)
#mistralai/Devstral-Small-2505
def openrouter_chat(user_message, history):
    """Send user_message to mistralai/devstral-small:free and append to history."""
    # build the messages list
    msgs = [{"role": "user", "content": user_message}]
    # call the model
    resp = client.chat.completions.create(
        model="mistralai/devstral-small:free",
        messages=msgs,
        # you can tweak max_tokens, temperature, etc. here
    )
    bot_reply = resp.choices[0].message.content
    history = history or []
    history.append((user_message, bot_reply))
    return history, ""

with gr.Blocks() as demo:
    gr.Markdown("## 🦜🔗 Gradio + OpenRouter Chat with Devstral-Small")
    chatbot = gr.Chatbot(label="Chat")
    msg_in = gr.Textbox(placeholder="Type your question here…", label="You")
    msg_in.submit(openrouter_chat, inputs=[msg_in, chatbot], outputs=[chatbot, msg_in])
    demo.launch()