app.py

import gradio as gr
import requests
import json
import os

# Retrieve the OpenRouter API Key from the Space secrets
API_KEY = os.getenv("OpenRouter_API_KEY")

# Define available models for selection
MODEL_OPTIONS = [
    "openai/gpt-4o-mini-2024-07-18",
    "meta-llama/llama-3.1-405b-instruct",
    "nvidia/llama-3.1-nemotron-70b-instruct",
    "qwen/qwen-2.5-7b-instruct",
    "mistralai/mistral-large-2411",
    "microsoft/phi-3-medium-128k-instruct",
    "meta-llama/llama-3.1-405b-instruct:free",
    "nousresearch/hermes-3-llama-3.1-405b:free",
    "mistralai/mistral-7b-instruct:free",
    "microsoft/phi-3-medium-128k-instruct:free",
    "liquid/lfm-40b:free"
]

# Initialize history
history = []

def generate_text(input_text, selected_model, history_state):
    global history
    response = requests.post(
        url="https://openrouter.ai/api/v1/chat/completions",
        headers={
            "Authorization": f"Bearer {API_KEY}",
            "Content-Type": "application/json"
        },
        data=json.dumps({
            "model": selected_model,  # Use selected model
            "messages": [{"role": "user", "content": input_text}],
            "top_p": 1,
            "temperature": 1,
            "frequency_penalty": 0,
            "presence_penalty": 0,
            "repetition_penalty": 1,
            "top_k": 0,
        })
    )
    
    # Handle errors
    if response.status_code != 200:
        return f"Error: {response.status_code}, {response.text}", history_state
    
    # Parse and return the content of the response
    try:
        response_json = response.json()
        result = response_json.get("choices", [{}])[0].get("message", {}).get("content", "No content returned.")
    except json.JSONDecodeError:
        result = "Error: Unable to parse response."
    
    # Add the current interaction to the history
    history_entry = {
        "input": input_text,
        "selected_model": selected_model,
        "response": result
    }
    history.append(history_entry)
    
    # Update the history state
    history_state = history
    
    # Prepare the formatted history string
    formatted_history = "\n".join([f"Input: {entry['input']}\nModel: {entry['selected_model']}\nResponse: {entry['response']}\n" for entry in history])
    
    return result, formatted_history

# Create Gradio interface with a dropdown for model selection
iface = gr.Interface(
    fn=generate_text,
    inputs=[
        gr.Textbox(lines=2, label="Input Text", placeholder="Enter your query here"),
        gr.Dropdown(choices=MODEL_OPTIONS, label="Select Model", value=MODEL_OPTIONS[0]),
        gr.State()
    ],
    outputs=[
        gr.Textbox(label="Response", placeholder="Response will be shown here"),
        gr.Textbox(label="History", placeholder="Interaction history will be shown here", lines=10, interactive=False)
    ],
    title="Chat with OpenRouter Models"
)

# Insert custom CSS for scrollable sections
iface.add_component(gr.HTML("""
    <style>
        #output-comparisons {
            height: 300px;
            overflow: auto;
            border: 1px solid #ddd;
            padding: 10px;
        }
        #output-history {
            height: 300px;
            overflow: auto;
            border: 1px solid #ddd;
            padding: 10px;
        }
    </style>
"""))

iface.launch()