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Turn any document, video or topic into a finished quiz in seconds

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Open-source AI pair programming inside your terminal and git repo

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AI assignment helper with detection and humanizer in one place

A free place to study the Bible with an AI assistant

An open Markdown convention for telling coding agents how your project works

AI-powered practice and scoring for the Duolingo English Test

AI agents for software engineering, scaled at inference time

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Pass your Dutch driving theory exam the first time with online lessons, quizzes, and practice exams

Answer on-screen quiz and homework questions without leaving the tab

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Turn any page, PDF or topic into flashcards, quizzes and study notes

Compare 47+ vector databases on the tradeoffs that matter in production

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Turn any study material into an exam-ready question bank in one minute

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Snap a photo of any exam question and get an instant GPT Vision explanation

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An AI mentor that coaches, not spoils, your LeetCode practice

Know your grade before you submit your assignment