from decimal import Decimal

def calc_cost(tokens: tuple) -> Decimal :
    """计算费用"""
    input_tokens, output_tokens = tokens
    if input_tokens <= 32000:
        input_price = Decimal("0.001")
        output_price = Decimal("0.01")
    elif input_tokens <= 128000:
        input_price = Decimal("0.0015")
        output_price = Decimal("0.015")
    else:
        input_price = Decimal("0.003")
        output_price = Decimal("0.03")

    # 计算费用
    input_cost = (Decimal(input_tokens) / Decimal(1000)) * input_price
    output_cost = (Decimal(output_tokens) / Decimal(1000)) * output_price

    return input_cost + output_cost