NotebookLM vs ChatGPT vs Claude: Best AI for Your Notes

If you want to study from your own notes and nothing else, use NotebookLM. It only knows what you upload, which means zero hallucinated facts and zero off-topic tangents. But if you need explanations beyond your notes or want to generate practice exams fast, ChatGPT and Claude each bring something NotebookLM cannot do.

Most students pick one tool and stick with it. That is a mistake. Each of these three handles your notes differently, and the best approach depends on whether you are reviewing lecture slides, reading a 200-page PDF, or trying to turn messy handwritten notes into something useful. This guide breaks down exactly which tool to open for each situation, with prompts you can copy.

The Three Tools at a Glance

Uploading PDFs and Lecture Slides

This is where most students start: you have a PDF of lecture slides or a textbook chapter, and you want an AI to help you study from it. All three tools accept PDF uploads, but the experience is wildly different.

NotebookLM treats your PDF like a sealed knowledge base. Once you upload it, every answer comes directly from that document with inline citations pointing to the exact passage. You will never get a response that includes information from outside your source. This is huge for exam prep because you know the AI is only pulling from material your professor actually assigned. You can upload up to 50 sources per notebook, including Google Docs, Slides, web pages, and even YouTube videos.

ChatGPT accepts PDFs through its file upload feature. It will read the document and answer questions about it, but it also mixes in its own training data. This means you might get a more comprehensive answer, but you cannot be 100% sure every detail came from your notes. On the plus side, ChatGPT can explain concepts from your PDF using analogies and examples that are not in the original document, which is incredibly helpful when the textbook explanation just does not click.

Claude handles PDF uploads similarly to ChatGPT but with a major advantage: its 200K-token context window means it can hold an entire 500-page document in memory at once without losing track of earlier sections. If you are working with a massive textbook chapter or multiple long readings for the same class, Claude is the least likely to forget what it already read.

NotebookLM prompt:
"Summarize the key concepts from all my uploaded sources. For each concept, tell me which source it came from and give me a one-sentence explanation I could use on a flashcard."

ChatGPT prompt:
"I just uploaded my lecture slides on [topic]. Explain the three most important concepts from these slides using simple analogies. Then ask me a question about each one to check if I understood."

Claude prompt:
"I uploaded a [X]-page reading for my [subject] class. Create a structured study guide that covers every section. Include key terms with definitions and the page numbers where each concept appears."

Turning Handwritten Notes into Study Material

If you are someone who takes notes by hand (and there is actually good cognitive science supporting this habit), you need a way to get those notes into an AI. Here is how each tool handles it.

ChatGPT is the winner here. You can snap a photo of your handwritten pages and upload them directly. GPT-5.4's vision capabilities are solid at reading most handwriting, even messy lecture scribbles. It will transcribe the text, organize it into sections, and then you can use all the usual study techniques like quiz generation or Feynman-style explanations.

Claude also accepts image uploads and can read handwritten notes through its vision feature. The quality is comparable to ChatGPT for clean handwriting, though it can struggle more with very messy or abbreviated notes. Claude's advantage is that once it has processed your notes, its larger context window holds them better across a long conversation.

NotebookLM does not support image uploads as sources. You would need to transcribe your handwritten notes into a Google Doc first, then add that Doc as a source. This is an extra step, but once the text is in there, you get all the benefits of source-grounded responses.

Generating Quizzes and Practice Tests from Your Notes

Active recall is the most effective study technique, and all three tools can generate quizzes. But the approach and quality differ significantly.

ChatGPT is the fastest and most flexible quiz maker. You can specify the exact format (multiple choice, short answer, essay, matching), difficulty level, and number of questions. The Study Mode feature adds a nice touch by making ChatGPT more Socratic in its quiz delivery, giving you hints before revealing answers. The downside is that ChatGPT might include questions about concepts not in your specific notes since it draws on its broader knowledge.

NotebookLM generates quizzes that are strictly grounded in your uploaded sources. Every question comes directly from your material, which is perfect when your professor says the exam will be "from the slides only." The quiz generation is less customizable than ChatGPT, but the accuracy-to-your-material tradeoff is worth it for exam prep.

Claude can build excellent quizzes, especially essay-style questions that test deeper understanding. Its strength is creating questions that require you to connect ideas across different sections of a long document. But Claude's strict free-tier limits mean you might run out of messages before finishing a full practice exam, so save your Claude messages for the high-value questions.

ChatGPT quiz prompt:
"Based on the notes I uploaded, create a 15-question practice exam. Use 10 multiple choice and 5 short answer. Mark the difficulty of each question as Easy, Medium, or Hard. Do not show answers until I ask."

NotebookLM quiz prompt:
"Create a study guide with 10 questions that test the most important concepts across all my sources. For each question, cite which source contains the answer."

Where Each Tool Falls Short

No tool is perfect. Knowing the weaknesses saves you from wasting time on the wrong one.

NotebookLM's Secret Weapon: Audio Overviews

This is the feature that makes NotebookLM genuinely unique. You can turn any set of uploaded sources into a podcast-style audio discussion between two AI hosts. They will walk through your material, debate key points, highlight what matters most, and make connections between different sources.

This sounds gimmicky until you try it. Listening to a 15-minute audio summary of your 80-page reading while walking to class or doing laundry is an incredibly efficient way to get a first pass through dense material. It is not a replacement for actually reading, but it gives you a mental framework so that when you do sit down to read, you already know what to expect. Some students even use the interactive mode where you can interrupt the hosts and ask follow-up questions mid-conversation.

Neither ChatGPT nor Claude has anything like this. ChatGPT has voice mode where you can talk through problems, and that is useful in its own way. But it is a conversation with you, not a curated discussion of your materials. NotebookLM's audio overviews are passive learning at its best, perfect for commutes, gym sessions, or when your eyes are too tired to read another page.

Which One Should You Actually Use?

Stop overthinking it. Match the tool to the task:

A Real Study Session Using All Three

Here is what an actual study session looks like when you combine all three tools. This is not theoretical; this is a workflow you can run today for any class.

Say you have a midterm in your psychology class next Wednesday. Your professor gave you 6 lecture slide decks and two chapters from the textbook.

That four-step workflow takes maybe 3-4 hours spread across three days, and it covers passive review (audio), concept understanding (ChatGPT), deep analysis (Claude), and active testing (NotebookLM). Compare that to staring at slides for 6 hours the night before.

For more study strategies you can pair with this workflow, check out our guide on how to use ChatGPT to study. And if you are comparing the big three AI chatbots more broadly (not just for notes), our ChatGPT vs Claude vs Gemini breakdown covers everything from pricing to essay writing to math.

Frequently Asked Questions