All the users in the comments here complaining about API limits and usage limits have missed the boat. You're not the target audience. This AI is not for you. It's not for consumers and end users. This AI is for the multi-billion and trillion-dollar businesses who are signing massive contracts to get these models enabled for their entire company. I've been using Sonnet 4.5 for months and never had a usage limit ever. And I used every model before that, all day and all night, and never once saw any mention of usage limits. Never saw a bill either. If "price per token" is a concern to you then you already lost.