Last updated 08-10-2026
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AI Summarizer | Sassbook
Sassbook AI Text Summarizer is a web-based summarizer that condenses pasted text into short abstracts using either abstractive or extractive methods. You pick a target size (Small, Best, Verbose, or Custom), paste your document, and the tool returns a rewritten summary rather than a string of copied sentences. A demo mode lets you test settings on pre-loaded sample text before using your own.
Compared with extractive tools that only pull key sentences, Sassbook defaults to abstractive mode, which rephrases the source in new wording. Paid plans unlock configurable length controls, larger document limits up to 20 pages (about 50,000 characters on Premium), and unlimited daily summaries. A developer API supports automated workflows with metered pricing per 1,000 tokens.
Students, teachers, and researchers use it to digest long readings faster. Content teams use it to turn research notes into brief, readable summaries. Developers can wire the summarizer into pipelines through the Text Summarizer API, with free API credits included on Standard and Premium subscriptions.
Switch between abstractive (rephrased) and extractive (sentence-picking) summarization modes
Four target sizes: Small, Best, Verbose, and Custom length controls on paid plans
Free tier handles 2.5 pages per document with 15 summaries per day
Premium plan processes up to 20 pages (about 50,000 characters) per summarization
Developer API with abstractive pricing from $0.02 per 1,000 tokens on the first 10M tokens monthly
Demo mode with pre-loaded text to explore settings before pasting your own document
Offers both abstractive rephrasing and extractive sentence selection in one tool
Free tier requires no credit card and supports 15 summaries per day
Developer API with metered token pricing for automated summarization pipelines
Free plan caps documents at 2.5 pages and blocks configurable length settings
Subscriptions bundle all Sassbook apps; you cannot buy the summarizer alone
API-only access requires a $25 charge after a 7-day trial period
Is Sassbook AI Summarizer free?
AI Summarizer | Sassbook includes a free tier at signup. Free users get 2.5 pages per summarization and 15 summaries per day. Configurable length settings and larger document limits require a paid Standard or Premium subscription.
What is abstractive summarization in Sassbook?
AI Summarizer | Sassbook defaults to abstractive mode, which reads your text and writes a new summary in its own words. You can also switch AI Summarizer | Sassbook to extractive mode, which selects key sentences from the original instead of rephrasing.
How large a document can Sassbook summarize?
AI Summarizer | Sassbook accepts about 2.5 pages per document on the free plan. AI Summarizer | Sassbook Standard raises the limit to 10 pages, and Premium handles up to 20 pages, which the site lists as roughly 50,000 characters per summarization.
Does Sassbook offer a summarizer API?
Yes. AI Summarizer | Sassbook offers a Text Summarizer API for automated workflows with abstractive and extractive methods. AI Summarizer | Sassbook commercial subscribers get monthly API credits ($15 on Standard, $25 on Premium), and an API-only plan starts with a $25 charge after a 7-day trial.
What does Sassbook Standard cost?
AI Summarizer | Sassbook is included in Sassbook Standard, which costs $32.50 per month when billed yearly. The plan adds unlimited summarizer usage, 10 pages per summarization, configurable settings, and $15 per month in API credits shared across Sassbook products.
Can I summarize without signing up?
AI Summarizer | Sassbook runs a demo mode in the browser with pre-loaded sample text so you can test settings. To paste your own documents and unlock paid features like custom summary lengths, you sign in to AI Summarizer | Sassbook and choose a subscription plan.