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Free for teachers when students pay for the course.

Each student pays $50 once for your course, and everything in it is free for you. For everything else, every new account gets 5,000 free AI credits that never expire. No card needed.

  • Courses your students pay for

    $50/student, per courseFree for you

    You run the course. Each student pays once for it.

    • Free for you: every AI feature in the course is included, grading, the Student helper, the Smart builder and videos
    • Each student pays $50 once, for the whole course
    • Students pay before they take its quizzes, and can get their money back for 7 days after paying
    • For any course: college classes, certification prep, training
    • Turn it on in a course's Settings
    Start for free

    Students pay by card, Apple Pay or Google Pay

  • Pay as you go

    $2/1,000 creditsAfter 500 free every month

    For quizzes outside a course students pay for. No subscription.

    • 500 free AI credits every month: 500 Fast-graded answers
    • Then $2 per 1,000 credits, from $10, by hand or by auto top-up. They never expire
    • Every AI feature: Smart grading, the AI-use check, the Student helper, the Smart builder, teaching videos
    • No limit on quizzes, students or courses
    • Multiple choice, multi-select and fill in the blank, always free
    • The Fast quiz builder, always free
    Start free

  • School

    CustomFrom 10 teachers

    Coming soon. Tell us about your school.

    • Credits for every teacher, on one bill
    • Your school pays for its students' courses

Multiple choice and fill in the blank are always free. They are graded from your answer key, with no limit on any plan, and so are quizzes, students and courses. The 500 free AI credits a month cover about one class taking a weekly five-question quiz.

What uses credits and what doesn't

A class of 30 answering 5 written questions: 150 credits.

FeatureCredits
A Fast-graded answerThe AI grades a written answer (a short answer, or a blank you set to AI grading) against your correct answer and rubric: 1 credit an answer. Fast is the default. Regrading takes credits again.1
A Smart-graded answerA stronger grading AI for answers that need careful judging, picked in a quiz's AI grading setting: 25 credits an answer instead of 1. A grading that fails gives its credits back.25
The AI-use check, for each checked short answerOff by default. When it is on, the AI estimates whether each short answer was written with AI. Only you see it, and it never changes the score. It adds 1 credit to each short answer it checks.+1
Files with an answer (images, PDFs, spreadsheets)With File answers on, students can attach images, PDFs or spreadsheets to an answer, and the grader reads them: 1 more credit an answer. An answer with a video is not AI-graded: you grade it, for free.+1
A Student helper messageThe AI Student helper chats beside each question and helps without giving the answer away. Off by default. Each message a student sends takes 25 of your credits, given back if no reply comes. Trying it in your Preview is free.25
Each web search in a helper replyThe Student helper can search the web to answer a student. Each search in a reply adds 50 credits.+50
Each step of a Smart builder replyThe Smart mode of the AI quiz builder, for harder requests. Each step of its reply, such as reading your quiz or saving questions, takes 50 credits; most replies take 3 to 5 steps. A failed step gives its credits back. The Fast mode is free.50
AI video creationA short AI-made teaching video of cards, with an optional voiceover, pictures, and animations. Its credits depend on how many pictures and animations it has. It is charged once it is made: a failed or stopped video costs nothing.500–1,500
A picture for a question, from the quiz builderA still picture the AI quiz builder draws for a question when you ask for one, shown to students with the question: 50 credits a picture, with the Fast or the Smart builder. A picture that fails or is stopped costs nothing.50
An adaptive quiz's follow-up questionOn an adaptive quiz, the AI writes a student a new question on the ideas their answer missed: 2 credits a question, and its answer is graded like any other. A question that fails costs nothing, and with no credits left the student gets none.2
An adaptive quiz's follow-up question, Smart AIAn adaptive quiz on the Smart AI (the Smart question writer, or Smart grading for a follow-up asked right away): a stronger AI writes each new question, for 25 credits instead of 2.25
A change from ChatGPT, Claude or the CLIChatGPT, Claude or the lmsys CLI, connected to your account, changes something in LMSystems or Canvas for you: it adds, edits, grades, emails or deletes. Each change takes 1 credit, given back if it fails. Reading is free. An AI regrade also takes its grading credits.1
Creating, Distributing, and Grading Quizzes without AIFree
Quiz suggestions and importsFree
Canvas assistantFree
Live dictationFree
Read aloudFree
Your own PreviewFree
Student view of a courseFree
Lockdown BrowserFree
Multiple choice and multi-selectFree
Fill in the blank, from your answer keyFree
Grading by handFree
Quizzes with AI grading offFree
Fast AI Mode Quiz builderFree

Credit costs follow our AI costs and may change. We list each change here before it applies.

Questions

Good questions, answered.

How do courses students pay for work?

Make a course, choose "Students pay" in its Settings, and add your students. Everything in the course is free for you, AI grading included. Each student pays $50 once for the course, from the course's page. Until they pay, they can't take the course's quizzes.

Can students get their money back?

Yes, for 7 days after paying, from their Profile. After that the payment stays.

What are AI credits?

Outside a course your students pay for, every AI feature that costs us money takes credits: a Fast-graded answer takes 1, a Smart-graded one 25, and the table above has the rest. Multiple choice, multi-select and exact-match fill in the blank are graded from your answer key, so they never take any. Your free credits start again on the 1st of each month, and credits you buy never expire.

What happens when my credits run out?

Nothing is lost. Students can still answer, their work is saved, and choice questions are still graded. Written answers wait until you add credits or your credits reset, and you see how many are waiting. Turn on auto top-up and they never run out. Your students never see a limit.

How does pay as you go work?

You buy credits when you need them: $2 for 1,000, $10 to $500 at a time. They are used after the month's free credits. Buy them on Plan & usage, or turn on auto top-up so grading never waits. They never expire, and they are not refunded.

What do I get when I sign up?

5,000 free AI credits that never expire, on Pay as you go. They are used after the month's free credits. We never ask for a card when you sign up, so nothing is charged unless you buy credits.

Can my school pay?

For 10 or more teachers, write to sean@lmsystems.ai.