app/config.py

import os

OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY")

# List of free models on OpenRouter
FREE_MODELS = [
    "openrouter/ggml-alpaca-7b",
    "openrouter/mistral-7b-instruct",
    "openrouter/llama2-13b-chat",
    "openrouter/openchat-3.5"
]