ChatGPT is a great explainer. Tali is for the weeks before an exam: questions from your own material, a record of which topics you have actually proven, and the shaky ones brought back on schedule.
Try it freeYou don't have to pick one. One way to split it: understand with a chatbot, prove it with Tali.
Lecture slides, a textbook chapter, a PDF of notes, last year's paper — PDF, DOCX, PPTX, text or photos of pages, up to 30MB a file. Tali breaks it into short notes, one idea each, so every question can be traced back to a passage you gave it.
Tali writes fill-in-the-blank and multiple-choice questions from those notes, and marks a typed answer by meaning rather than exact spelling. Questions from a past paper you import keep their own format, open questions included. Answering is free, as many times as you like.
A topic is marked verified only when you've got it right twice, asked two different ways. Everything else stays visible, comes back on a schedule, and — if you set an exam date — gets spread across the days you have left.
These aren't rivals so much as two different jobs. A chat is the fastest way to understand something. An exam needs something that remembers, across weeks, what you got wrong.
| ChatGPT | Tali | |
|---|---|---|
| Explains a topic step by step and answers follow-up questions | Yes | Yes |
| Quizzes you and gives feedback (ChatGPT's study mode does this) | Yes | Yes |
| A topic counts as learned only after two correct answers, asked two different ways | — | Yes |
| Missed questions come back on a spaced-repetition schedule | — | Yes |
| One view of the whole course: which topics are verified, shaky or untouched | — | Yes |
If you want something explained right now, ChatGPT is excellent — keep using it. Tali is the part that sits between the explanation and the exam: it holds onto the questions, the mistakes and the date.
The questions you missed on Tuesday are still there on Friday, filed under the course they belong to, without pasting the chapter back in.
Getting one question right can be luck or recognition. Tali only counts a topic once you've answered it correctly in two different phrasings — that's the bar the exam will hold you to.
Wrong answers enter a spaced-repetition queue and resurface right before you'd forget them. You don't have to remember what to ask about.
Set your exam date and Tali tells you how many topics to cover a day. The night before, it can send one email listing the ones that are still open.
A midterm, a final, a certification. If there is a day you'll be tested, you need to know what's still missing before it arrives.
Keep it for explanations. Use Tali for the questions, the mistakes and the countdown — the parts that have to persist between sessions.
Your lecturer's slides, your course reader, your past papers. Tali works from what you upload, so practice matches what you'll actually be asked.
Yes. ChatGPT, especially in its study mode, can ask you questions about a topic and give feedback. Where Tali differs is persistence and rules: questions are written from material you upload and kept per course, a topic only counts as verified after two correct answers asked two different ways, and missed questions come back on a spaced-repetition schedule.
You get 15 free credits when you create an account, no card required. One credit turns one source into notes plus its practice questions. Answering questions is free however often you come back, and AI marking of written answers is included. Chat is one credit per 12 messages; voice is one credit per two minutes.
No. Tali runs on other AI models (Google's Gemini and DeepSeek) and is not affiliated with OpenAI. It is a separate study app with its own account.
Yes. Each course has a chat tutor that answers from your uploaded notes and quotes the line it relied on; for background questions it also draws on general knowledge. You can keep ChatGPT open alongside it too.
PDF, DOCX, PPTX, Markdown, plain text, and photos or screenshots of pages (PNG, JPG, WEBP, HEIC), up to 30MB per file. You can also paste text or a web page link.
English, Chinese, Spanish, Japanese, Korean, French, German, Portuguese, Russian and Italian. Notes and questions can be in your language even when the material is in another.
Drop in a PDF and get notes you can actually study from — then let Tali quiz you until you can explain it.
Upload the chapter you have to know cold. Tali writes the questions and schedules them — what you miss comes back tomorrow, what you know comes back in a month.
Not generic questions — questions from the exact chapter you just read, marked by something that tells you what you missed.
Upload a past paper and Tali reads it question by question — then writes you a note for each exam point it tests. CFA, PMP, CPA, university finals.
Upload the same PDF you'd drop into NotebookLM. Tali turns it into quizzes, grades what you write, and keeps bringing back what you got wrong — so you don't just chat with your notes, you learn them.
Ask your PDF anything and get answers grounded in the page. Then let Tali quiz you on it, mark what you write, and resurface what you missed — because chatting with a document isn't the same as knowing it.
If that's happened to you, the problem isn't effort — it's that nothing you're using can tell you which topics you only think you've got. Tali works from your own material, quotes the exact source for every supported point, and gives you that list.
No set to build, no set to hunt for. Upload the chapter you're being tested on and Tali turns it into practice questions — and practising them is free.
