Classroom & billing policy¶

How costs and limits work for a classroom. (For the step-by-step, see the teacher guide.)

Who pays¶

A student's classroom usage — AI chat, realtime voice, and cloud simulator time — is deducted from the teacher's credits, counted against that student's sponsor limit. Students don't spend their own credits for classroom work.

The limits a teacher sets¶

Control	Effect
Default sponsor limit	Default spending cap per student (10 credits unless the teacher changes it)
Per-student limit	Override the cap for individuals (limits can be set up to 10,000 credits)
Allowed chat models	Restrict which models students may use. New classrooms start with a curated default list that already excludes the most expensive models; the teacher can change it.

When limits are hit¶

Teacher out of credits → students see a "classroom credits exhausted" message, new AI usage stops, and running student simulators are stopped automatically.
Student over their sponsor limit → that student sees a "limit reached" message until the teacher raises the limit.

Membership controls¶

A teacher can activate/deactivate the invite, regenerate the invite code, remove a student, or suspend the classroom.