[ pricing ]
Plans and features
| what you get | Free$0/mono card, everreviews and chat to start | Builder | start hereMentor | Mentor Pro | Mentor Max |
|---|---|---|---|---|---|
| labs & grading | |||||
| Lab accessRust for Beginners is free, every lab of it, and the first 2 labs of Rust for Systems; the rest of the catalog unlocks with a plan | Rust for Beginnersevery lab — graded, completions and all · the first 2 labs of Rust for Systems are free too | every live labnew courses as they go live | every live labnew courses as they go live | every live lab | every live lab |
| Official grading, verified completionspermanent — a completion survives cancelling | [ ✓ ]every lab of it | [ ✓ ]every lab | [ ✓ ]every lab | [ ✓ ] | [ ✓ ] |
| Sequential unlockmoney never skips the line | same for everyone | same for everyone | same for everyone | same for everyone | same for everyone |
Public proof page/proof/<slug> · opt-in · retirable | [ ✓ ] | [ ✓ ] | [ ✓ ] | [ ✓ ] | [ ✓ ] |
| the mentor | |||||
| Mentor creditsthe only thing the paid tiers differ on | 120 creditslifetime — about three code reviews and a month of questions · on any lab that's free | one-time300 credits, yours until used | 350 / momentor credits a month | 700 / mo | 1050 / mo |
Written hint laddersboot hint / the hint ladder · never metered | unlimited | unlimited | unlimited | unlimited | unlimited |
| Your diff, every submitwhat you changed, rendered | [ ✓ ] | [ ✓ ] | [ ✓ ] | [ ✓ ] | [ ✓ ] |
| Full AI code reviewagainst the reference · round over round | [ ✓ ]on your first submit of each lab · 3 a day | one-timethen your diff on every submit | 20 creditsfrom your pool | 20 credits | 20 credits |
Mentor chatweb · sboot explain | 3 / dayenough to try it on real code | 1 credit / messageany lab, from your one-time pool | 1 credit / message | 1 credit / message | 1 credit / message |
| Reveal — skeleton, then the referencemarks the lab solution-assisted | [ ✓ ]unmetered | [ ✓ ] | [ ✓ ] | [ ✓ ] | [ ✓ ] |
| billing | |||||
| Billingannual coming — about 2 months free | no card | monthly | monthly | monthly | monthly |
| Choose a plan | |||||
| Terms | free forever · no card | auto-renewing · cancel anytime | |||
1 credit = one message · 20 credits = one full review · a plan’s pool resets every month · a free account’s is a one-time pool rather than a monthly one · Builder opens with 300 of them, once — yours until used · your grade never waits on AI.
Questions about what a verified completion means? The course FAQ answers it.
Checkout opens soon — you’re first at the discounted price.