How to choose an AI summarizer for what you actually read
Pick a summarizer by testing it on your own sources: check that it keeps numbers and attribution, understand the data path and costs, and make sure you can get your notes out.
Allan Warsing
Feature lists all look the same. The fastest way to choose an AI summarizer is to ignore them and test the tool on what you really read for a week.
Test with your own sources
Pick three things you would normally read: a typical article, a difficult PDF, and a captioned video. Summarize each one, then compare the summary with the original. Look for:
- numbers that survived intact,
- quotes and claims still attributed to the right person,
- limitations and caveats that were kept rather than smoothed over,
- anything the summary states that the source never said.
That last check matters most. A summary that invents a detail is worse than no summary, because it sounds sure of itself.
Check how it handles mistakes
Every model gets things wrong sometimes. A good tool helps you notice. Reduz, for example, can check each finished summary against its source with Jev, an optional verification model. It flags contradicted or unsupported claims, tries to correct them, and tells you what it changed or what still needs review.
Follow the data path
Ask where your text goes. Does it pass through the company's servers, or straight to an AI provider? Are summaries stored on the company's servers or on your device? Reduz sends text directly from your browser to the provider you choose and keeps history locally, but plenty of good tools work the other way. Pick the trade-off you are comfortable with.
Also ask how the tool treats hostile pages. Some web pages hide instructions meant to steer an AI. Reduz marks everything it reads from a page as untrusted source material and removes images and unsafe links from the output, which narrows what such a page can do.
Follow the money
Subscriptions are simple to budget. Bring-your-own-key tools charge nothing themselves, and you pay the provider for what you use. Light readers often pay less with a key. Heavy readers should check their provider's usage page after the first week.
Make sure you can leave
Finally, check that your notes can come with you. Export to Markdown or DOCX, and a full-history download in an open format like JSON, mean a tool cannot hold your reading hostage.