pdfGPT
FreeInteractive conversations with the contents of PDF files.
FreeFree tier
Outputs: text
About pdfGPT
pdfGPT is an open-source tool that enables interactive conversations with the contents of PDF files using GPT models. It breaks documents into chunks, uses Universal Sentence Encoder for embeddings (no vector database or indexing), and supports GPT-3.5 Turbo, GPT-4, and 16K/32K token models. The tool provides accurate responses, chat history, and pre-defined questions, all without relying on third-party APIs like LangChain.
Key Features
Chat with PDF content using GPT models
Supports GPT-3.5 Turbo, GPT-4, and 16K/32K token variants
Uses Universal Sentence Encoder for embeddings without vector database or indexing
No third-party dependencies like LangChain
Chat history feature
Pre-defined questions for auto-filling input
Open source and free to use
Pros & Cons
Pros
- Highly accurate responses due to unique architecture
- Simple setup without vector DB or indexing overhead
- No vendor lock-in with third-party APIs
- Open source and free (bring your own OpenAI API key)
- Supports multiple GPT model sizes for different needs
- Chat history enables conversational flow
Cons
- Requires an OpenAI API key (no built-in LLM)
- Turbo models may underperform for certain QA tasks; text-DaVinci-003 or GPT-4 recommended for best results
- Currently supports only single PDF files (multiple PDF support planned but not yet implemented)
- No OCR support yet (future release planned)
- Setup requires some technical knowledge (Git, Python)
Best For
Extracting specific information from PDF documentsInteractive Q&A with research papers and reportsBuilding chatbots for PDF-based knowledge basesSummarizing content from PDF filesAutomated document analysis and retrieval
FAQ
What GPT models does pdfGPT support?
pdfGPT supports GPT-3.5 Turbo, GPT-4, and their 16K/32K token variants. It also supports the older text-DaVinci-003 model for better QA accuracy.
Does pdfGPT use LangChain or other third-party APIs?
No, pdfGPT uses no third-party APIs such as LangChain. It uses embeddings with the Universal Sentence Encoder and no vector database or indexing.
Is pdfGPT free to use?
Yes, pdfGPT is completely open source and free. You only need to provide your own OpenAI API key for GPT access.
What if the response quality is poor with Turbo models?
For best QA results, especially when embedding similarity is low, use text-DaVinci-003 or GPT-4 instead of GPT-3.5 Turbo as they produce more relevant output.