dominik83d / lex-gpt

chatgpt

Lex GPT

This app enables AI-powered search for Lex Fridman podcast.

This is also a testbed for exploring Langchain functionality.

Dataset

Scrape ep 1-325 Whisper transcriptions via @karpathy for first 325 episodes:

https://karpathy.ai/lexicap/index.html

Trascribe remaining episodes (through episode 365) with Whisper.

Transcribed data is split / embedded (Pinecone) with Langchain.

All steps outlined in: scripts/get_data.ipynb

Search

Use Langchain VectorDBQAChain to:

• Embed the user query
• Perform similarity search on Pinecone embeddings
• Synthesize the answer from relevant chunks with GPT 3.5

Search

Relevant chunks with metadata (links) are displayed as source documents.

This builds on the excellent UI from https://github.com/mckaywrigley/wait-but-why-gpt.

Deploy

Note: the app that supports streaming is deployed to fly.io: https://lex-gpt.fly.dev/

This is because Vercel requires edge functions for streaming.

We are working on getting edge functions working with Langchain.

In the meantime, use https://lex-gpt.fly.dev/ for the more performant app.

Credits

Thanks to Mckay Wrigley for open-sourcing his UI.

Thanks to Lex Fridman for the excellent podcast.

Thanks to Karapthy for the Whisper transcriptions.

Contact

If you have any questions, feel free to reach out to me on Twitter!