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def chat(prompt, history, model_name, loaded_models):
    tokenizer = loaded_models[model_name]["tokenizer"]
    model = loaded_models[model_name]["model"]

    history.append(("πŸ§‘ " + prompt, ""))
    inputs = tokenizer(prompt, return_tensors="pt")
    output = model.generate(**inputs, max_new_tokens=100)
    reply = tokenizer.decode(output[0], skip_special_tokens=True)
    history[-1] = (history[-1][0], "πŸ€– " + reply.strip())
    return history, history

def download_chat(chat_history):
    return "\n\n".join([f"{user}\n{bot}" for user, bot in chat_history])