After the Summary, Keep Asking
Chat With Your PDF After @vustSummaryBot Summarizes It
Every PDF-document summary comes with a "💬 Ask about this PDF" button. Tap it and ask up to 3 follow-up questions grounded only in that document — each states its exact price up front, charged when you send it — within 30 minutes of delivery.
Scope
This works on a PDF you already summarized in the bot
Chat-with-PDF is a follow-up on a PDF-document summary already delivered by @vustSummaryBot — it's not a standalone document upload flow. It works on text-layer PDFs, the same ones @vustSummaryBot already reads; a scanned/image-only PDF still has no extractable text to answer questions from, see /summary/pdf/scanned-ocr for the OCR-first fix.
See the difference
From a delivered PDF summary to a grounded follow-up answer, in one button tap.
Who asks follow-up questions after a PDF summary
- Anyone reviewing a contract or policy PDF
- The summary covers the gist, but you need one exact detail — a notice period, a coverage limit, a deadline.
- Tap "Ask about this PDF" and get that one specific answer, grounded only in the document, instead of re-reading the whole file.
- Researchers checking one number in a paper
- A summarized study mentions a finding, but you need the exact sample size or methodology detail behind it.
- One follow-up question pulls the specific figure straight from the extracted text — or a plain 'not found' if it isn't there.
- Students re-checking a lecture-note PDF
- A summarized reading covers the main points, but a specific definition or example didn't make the summary.
- Up to 3 follow-up questions per document surface the detail without needing a second full pass through the file.
From a delivered summary to a grounded answer
- 01
Summarize a PDF as a direct upload
Send the PDF file itself to @vustSummaryBot — the "Ask about this PDF" button only appears on this document-upload path.
- 02
Tap "💬 Ask about this PDF"
Arms a 30-minute follow-up window on the exact text already extracted from your document — no re-upload needed.
- 03
Ask up to 3 questions, each priced up front
Each answer is grounded only in the document text; if it's not in there, the bot says so instead of guessing.
Summarize a PDF, then keep asking
Upload a PDF directly to @vustSummaryBot, tap "Ask about this PDF" on the result, and ask up to 3 grounded follow-up questions — each states its price up front, charged when you send it.
What this page covers
PDF-document uploads only, in this version
The button appears when you upload the PDF file itself. A PDF you reach through a link is read a different way, and that path does not offer the button yet.
Grounded-only, and says so
The bot is instructed to answer only from the part of your document it was given, and to say it did not find something rather than guess. That is an instruction, not a hard filter, so treat it as intent rather than a guarantee.
Bounded by design: 3 questions, 30 minutes
Three questions per document, and the window closes 30 minutes after delivery — so the cost of a single PDF upload stays predictable for you and for us.
Frequently asked questions
How do I start asking questions about a PDF?
First summarize the PDF normally in @vustSummaryBot — send it as a document upload. If the summary comes from a PDF file, the result includes a "💬 Ask about this PDF" button. Tap it once, and your next plain-text message to the bot is treated as a question about that specific document instead of a new summarization request.
How much does each question cost?
Each question states its exact price up front, and the charge lands when you send the question — refunded if the bot fails to answer. If your balance is too low, you'll see your current balance and what the question costs — no charge happens for the attempt itself.
How many questions can I ask about one PDF?
Up to 3 questions per document. After the 3rd answer, the next question gets a message telling you to start a new summary to continue — the 4th attempt is never charged. This cap exists to keep the feature's per-document AI cost bounded.
How long do I have to ask questions?
30 minutes from when the summary was delivered — not from when you tap the button. If you tap "Ask about this PDF" after the window has closed, or if you've moved on and the window expired mid-conversation, you'll get a clear "Session expired — please resend the PDF" message instead of a silent failure or a misrouted answer.
Can it answer anything, or only what's in the PDF?
Only what's in the document you summarized. The answering model is instructed to use just the text extracted from your PDF — if your question asks about something the document doesn't cover, it says so ("not found in this document") instead of inventing an answer from general knowledge.
Does this work on every PDF summary?
It's available on PDF-document summaries — files sent directly to @vustSummaryBot as a document upload with a text layer (the same text-extraction path described on /summary/pdf; scanned/image-only PDFs still have no text to work from, see /summary/pdf/scanned-ocr). PDF links summarized via a URL use a different extraction path and don't show this button in the current version.
Ready when you are
One button, three grounded follow-up questions.
Each question is priced up front and charged when you send it, 30 minutes from delivery, answered only from the document you already summarized.