单次调用成本Cost per Call
Cost per Call
解决什么问题What problem it solves
完成一次任务的实际花销，而不只是单价。What a task actually costs to run, not just the unit price.
这是什么What it is
单价 × 实际消耗的 token 数。不同任务的消耗量可以差几个量级。
Unit price times the tokens actually consumed. Consumption can differ by orders of magnitude between tasks.
为什么需要知道Why it matters
按单价选模型容易出错。同样便宜，消耗量不同的模型总成本可能相反。Choosing a model on unit price alone is easy to get wrong. Two models can cost the same per token and end up in the opposite order overall.