目前使用的套餐 The Plan I Use Now
60美金包月，如果使用起来好用的话，可能改成年付，年付可以省20%。
刚开始注册，是有免费试用的，然后最低的一个门槛是20美/月，系统给账户每周一定的额度，每周清零一次。
一开始我是使用的20美金包月，但该套餐的配额token不足以支持我的繁重任务，所以升级成了60美金包月。
I am on the $60/month plan. If it keeps working well for me, I may switch to annual billing — that saves about 20%.
When I first signed up there was a free trial. The lowest paid tier is $20/month: the system gives the account a weekly allowance of usage, and that allowance resets every week.
I started on the $20/month plan, but that plan’s token quota was not enough for my heavy workload, so I upgraded to $60/month.