Thread: [GUI Plugin] Ask AI Plugin
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Old 02-04-2026, 01:27 AM   #36
sheldonrrr
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Join Date: Feb 2025
Location: Shanghai
Device: Kindle Paperwhite 2, iPad mini 5
Quote:
Originally Posted by varia View Post
Hi, what is the largest number of selected book entries the AI can pull data from? If I select all book records (thousands) and ask something short and simple like "Help me find disabled protagonists", I get the response: "Question too long".

I am using:
Calibre portable 8.16.2
Ollama & Mistral
Now current status:
Prompt length limits:
- Single book mode: 2000 characters max
- Multi-book mode: 4000 characters max

When you select thousands of books, the metadata (title + author) for each book gets concatenated into the prompt. With ~50-100 characters per book, selecting 1000+ books easily exceeds the 4000 character limit, triggering the "Question too long" error.

Practical book selection limits:

- Roughly 40-80 books max depending on title/author length
- This is a client-side validation, not an AI model limitation.

I will fix this later. Thanks for your feedback.
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