10 Best AI Summarizers of 2026

Gemini Notebook is Google's new name for NotebookLM, and it is the most focused summarizer in this list. You add PDFs, notes, class materials, help articles or webinar files to a notebook, and every summary and answer is grounded in those sources rather than the open web. The free plan allows up to 50 sources per notebook with standard limits on chat and on outputs such as Audio Overviews, Slides and Flashcards, which is enough for most coursework. Google AI Plus, at $4.99 per month in the US, doubles usage and raises the cap to 100 sources per notebook; AI Pro raises it to 300 and AI Ultra to 600. Google says individual data is not used for training unless you share feedback. The limits: paid plans are only sold in some regions, and it will not go out and find the best article for you unless you use Source Discovery or Deep Research. For condensing a stack of documents into key points you can check, it is our top pick.

ChatGPT is the summarizer most people already have open, and it handles nearly every format a reader brings to it: pasted text, PDFs, spreadsheets and links. OpenAI's pricing page sets clear input limits that matter for summaries. The fast Instant model accepts about 12 pages of text on Free and about 40 pages on Go and Plus, while the reasoning models on Plus accept about 320 pages, enough for a long report or a short book. Free includes unlimited text chats but limited messages with uploads. Go costs $8 per month in the US and adds more uploads and longer memory, though OpenAI notes the plan may include ads. Plus at $20 per month adds advanced reasoning, expanded deep research and Projects, which keep a set of files together. The weak spot for summarizing is that answers are not tied to a fixed source set the way Gemini Notebook's are, so check quotes against the original.

Gemini is the best general assistant here for people whose reading arrives through Google's apps. The free tier covers the Gemini app with Deep Research, Canvas and Gems on the Flash-Lite model, plus Gemini Notebook for source-grounded summaries. Google AI Plus, at $4.99 per month in the US, doubles usage limits, moves you to the Flash model and adds Gemini in Gmail and Vids, so long email threads can be summarized where they live. AI Pro at $19.99 per month adds Google's Pro model, Gemini in Docs and Chrome, and lists file uploads of up to 1,500 pages, which suits contracts, theses and report bundles. The bundled storage, 400 GB on Plus and 5 TB on Pro, makes the price easier to justify if you pay Google for storage already. The catch is that the strongest model and the largest uploads sit on AI Pro, and some features are limited to select countries.

Claude suits readers whose material is long and text-heavy: reports, contracts, policy papers and transcripts. The Free plan already includes web search, file creation with code execution, memory and connectors to other apps, so you can test it on a real document before paying. Pro costs $17 per month on annual billing or $20 monthly and adds more usage, Projects, Claude in Chrome and the Microsoft 365 and Outlook add-ins. Projects matter for summarizing because they keep a set of files together, so you can ask for key points across all of them. Claude in Chrome brings the assistant into the browser. The main limit is usage: allowances reset every five hours and every week, and Anthropic notes that long chats and large files use them up faster. Readers who mostly summarize YouTube videos are better served by Eightify or Wordtune, which list video summaries as a core feature.

Perplexity summarizes the web rather than a document you bring. Ask about a news story, a product launch or a research debate and it returns a short written answer with numbered links to the pages it read, which makes it the easiest tool here for checking where a point came from. Pro costs $17 per month on annual billing and adds deep research reports, a choice of models such as GPT, Claude and Gemini, higher usage limits, memory and Perplexity Computer for building documents. The free plan covers light use. The trade-off is scope: it is designed for questions across many sources, so if you need key points from one PDF or a folder of your own files, Gemini Notebook or ChatGPT fits better. Pro and Max are for personal use under Perplexity's policies, and Max costs far more than Pro, so most readers should stop at Pro.

QuillBot's Summarizer is a single-purpose tool: paste or upload text, pick paragraph or bullet points, drag the length slider and press Summarize. That simplicity is why it scores high on ease of use. QuillBot's plan table lists summaries of 1,200 words on Free and 6,000 words on Premium, and Premium adds custom summaries that follow your own instructions, useful for meeting notes or research reports. The Premium plan also bundles the paraphraser, grammar checker, AI detector and 25,000 words a month of plagiarism checks, so students get a full writing kit for one price. QuillBot says over 35 million writers use its tools. The limits are clear: it summarizes text, not videos, and long reports above 6,000 words need splitting. From our location the Premium price appeared in euros, so we have not quoted a USD figure; check the price on QuillBot's site.

Scholarcy is the specialist pick for academic reading. Instead of a chat reply, it turns a paper, article, book chapter or YouTube video into an interactive summary flashcard that highlights key findings, concepts and contributions. The Enhance feature changes the summary depth from one sentence to a researcher level overview, and Spotlight jumps straight to the important points. The paid plan adds unlimited summarization, notes and highlights, collections, export of up to 100 flashcards at once, a Literature Matrix for comparing papers and one-click bibliographies, and it imports directly from Zotero. Scholarcy says over 600,000 people use it. The free Article Summarizer is limited, so regular users will want the paid plan, which comes with a 7-day free trial. From our location the price appeared in Polish zloty, so we have not quoted a USD figure. Outside academic work it is a narrow tool.

Wordtune is best known as a rewriting tool, but its Summarizer is a capable reader for both text and YouTube videos at the lowest paid price in this list. Summaries can be expanded section by section, and a library stores your links, video files and summaries with notes alongside. The plan limits are what matter. Basic is free but allows only 3 AI summarizations a month. Advanced costs $4.89 per month billed annually and allows 15 a month, plus 30 rewrites a day. Unlimited, at $6.99 per month billed annually, removes the summarization cap and adds unlimited rewrites. Both paid plans start with a 3-day free trial. Compared with ChatGPT or Gemini, Wordtune cannot answer follow-up questions across many files, but for someone who wants a cheap way to condense articles and videos and then rewrite notes, the Unlimited plan is good value.

Copilot makes sense as a summarizer only if your reading already happens in Microsoft's apps. Microsoft sells it to individuals inside Microsoft 365, so the $9.99 per month Personal plan buys Word, Excel, PowerPoint and Outlook, 1 TB of cloud storage and Copilot with higher usage than the free app. In Outlook, Copilot gives clear summaries of email to keep you organized, and in Word you can upload notes and ask it to work from them. The Researcher agent, which gathers information across sources, and the highest usage limits sit in Microsoft 365 Premium at $19.99 per month. Family covers more people, but Microsoft says the AI features are for the subscription owner only. As a pure summarizer for web articles, PDFs and videos, Copilot does less than ChatGPT, Gemini or Gemini Notebook, which is why it ranks near the bottom here despite the value of the Office bundle.

Eightify does one job: it summarizes YouTube videos. Installed as a Chrome extension, it adds key ideas to the YouTube page itself, with timestamped summaries so you can jump to the part of a video that matters. It also shows an overview of top comments, which helps you judge whether a long video is worth your time, and offers transcripts and summaries or translations in more than 40 languages. Summaries can be turned into shareable articles. Eightify has iOS and Android apps, and the company says it is trusted by more than 500,000 users. The limits are scope and pricing transparency. It does not summarize PDFs, articles or your own files, and we could not load a pricing page from our location, so no price is quoted here. Readers who summarize both videos and text will get more from Wordtune, which covers YouTube and articles from $4.89 per month billed annually.