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Core practice and daily ranking are free for everyone. Pro membership covers the compute cost of running LLM reasoning pipelines, custom video rendering, and real-time study messaging infrastructure.
Ideal for daily habit-building, basic self-assessment, and keeping an unbroken learning streak.
Unrestricted problem sets, on-demand AI video synthesis, personalized direct messages with challenge sharing, and streak freeze protections.
| CAPABILITY // SPECIFICATION | FREE | PRO |
|---|---|---|
| Daily practice questions | 10 questions / day | Unlimited (continuous bank) |
| Hard & Extreme problem sets | 2 teaser previews / day | Full access to all ML interview banks |
| AI Tutor text explanations | 5 queries / day | 100 queries / day with KaTeX proofs |
| AI Video explainer synthesis | Cached videos only | 15-20 novel synthesized videos / month |
| Study cohorts & groups | Join public groups | Create cohorts up to 250 engineers |
| Personalized direct messages | Standard 1:1 messaging | Unlimited DMs + interactive practice challenges & prompts |
| Leaderboard telemetry | Daily standing only | All-time history, cohort filters, percentile analytics |
| Streak freeze protection | None | 1 auto-replenishing freeze banked per month |