Embeddings

Every morning, my RSS reader greets me with hundreds of new posts. Tech blogs, indie developers’ journals, photography content - they all compete for attention. While I’ve gotten good at quickly scanning through these feeds , I keep wondering about all the great content I might be missing from sources I’ve had to ignore simply because their signal-to-noise ratio doesn’t justify daily checking. On the other hand, the posts that I shortlist from my RSS feeds and read or listen to, end up on a curated repository of articles that have passed my personal quality threshold, so I have access to a valuable collection of content (on Pocket ) that is relevant to my interests. This made me wonder, can I utilize this data, and create a content recommendation system tailored to my preferences? Can I build a system that would review new posts from feeds where only 1 in 20 posts might match my content priorities, and filter those for me? ...

In his excellent write up on state of the art embedding models, Aapo Tanskanen compares the retrieval score for when the source documents are split into chunks and when they’re not: Transformer-based single embedding models have traditionally had 512 token context windows because of the usage of the original BERT encoder. Newer models, like the BGE-M3, have expanded the token window to much larger scales. It could be tempting to forget chunking and just embed long texts as they are. However, that would mean mashing many topics and entities you might want to search for into a single vector representation, which doesn’t sound like a good idea. ...

Recently, I’ve been working on a side project where I use OpenAI’s text-embedding-ada-002 model to generate vector embeddings for text snippets. While this model is inexpensive, the cost can add up when dealing with thousands or millions of text snippets. Therefore, I decided to explore alternatives, particularly those that would allow me to run similar models locally instead of relying on OpenAI’s API. In this post, I’ll share my experience using the sentence-transformers library for this purpose and discuss the pros and cons. ...