Big files: answers from any page and editing a document in place

1Why search inside a document

The model reads an attached file in full while it is small. But from each file only the beginning goes into the request: roughly the first 50 thousand characters (about 25–30 pages), and for a PDF no more than 80 pages; per message, no more than 25 documents and about 250 thousand characters in total. If a contract has 200 pages, the model could miss the penalty clause on page 150 and honestly say the document was cut.

Search inside a document solves this: the file is “sliced” and indexed once, and for each question the assistant pulls out only the most fitting places. There's no need to read all 200 pages every time, so answers are faster and the price is lower.

2How to attach a big file

1. Click “+” on the left of the input field

   In the main chat at gibrid.ai/chat a menu opens.

2. Choose the file source

   Attach files is a file from your device. My documents is a file from your library (documents created and attached earlier).

3. Ask a question about the document

   For example: “Find in the contract what the penalty is for late payment” or “Which section of the report talks about 2025 revenue?”. Words like “in the document”, “in the file”, “in the contract”, “on which page” help the assistant understand that a file search is needed.

On the website you can attach a document of up to 100 MB, but for search the file must be no larger than 25 MB. More about attachments on the page about documents in chat.

3How the search inside a document works

• Slicing. The file's text is divided into pieces of no more than 900 characters along paragraph boundaries. For a PDF, the page number of each piece is remembered.
• The index. For each piece a numeric “fingerprint” of its meaning is computed (an embedding). The same service that powers the Gibrid agents' knowledge base does this. The index is saved.
• The search. Your question is also turned into a “fingerprint”, and the 6 pieces closest to it are pulled from the index.
• The answer. The assistant answers from these pieces and names the page (“p. N”). Word files have no detectable page numbers, so a page reference is available for PDFs.

No more than 600 pieces go into the index. That is roughly 500 thousand characters, about 250–300 pages of ordinary text; a longer “tail” of the file isn't searched. If the file is small (up to 50 thousand characters), the assistant already sees it in full, so no search is needed and nothing is charged.

4The price is shown before processing

1. The assistant names the price

   On the first search in a new file, processing doesn't start by itself. The assistant writes that the file needs to be indexed once and names the amount in G.

2. You reply “yes”

   If you agree, write “yes” or “go ahead”. If not, just don't reply or decline: nothing is charged.

3. The file is processed and the answer arrives

   After your consent the indexing runs, the amount is charged, and the assistant answers from the pieces it found.

4. Next questions are free

   The index is already built, so repeat questions about this file cost nothing.

5Editing a document in place

Before, to fix a couple of paragraphs in a Word file, the assistant rewrote the whole document, and the price grew with its size. Now it can change things surgically: it gives a list of replacements, and the rest stays as it was.

1. Attach a Word file

   “+” → Attach files (or My documents). Editing works with .docx, .doc, .rtf and .odt.

2. Say what to change

   For example: “Replace ‘Daisy LLC’ with ‘Tulip LLC’ everywhere in the contract” or “Rewrite the ‘Payment terms’ section: payment within 10 days”. You can give several edits at once.

3. Download the result

   A new file “name (ред.).docx” appears. The original file is not changed.

• Two kinds of edits. Replacing an exact fragment (“find → replace”) and new text for a whole section under a heading. Up to 30 edits at a time.
• The rest is untouched. The source's styles, fonts, page margins and headers/footers are kept.
• If a fragment isn't found, nothing changes: the assistant first reads the document's text and repeats the edit with an exact quote.
• Price. The model's reply is short (just the list of replacements), so the price doesn't grow with the file's size. To find the right place the assistant may first need to read the document (one read is up to 60 thousand characters).

6Limitations

• Only this chat's attachments. The assistant searches files you attached in this chat or picked from “My documents”. Arbitrary links on the internet are not read this way.
• Formats. Search works with PDF, Word (.docx, .doc, .rtf, .odt), .txt and .md. Excel spreadsheets, presentations, audio and video don't go into the index.
• Scans. The assistant can't read a PDF without a text layer (photos of pages): there is no text recognition from images here.
• Size. For search the file is no more than 25 MB and no more than 600 pieces (about 250–300 pages).
• One file per question. If there are several documents in the chat, name the one you need.
• Signed-in only. Attachments are not available to guests.

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