Don’t Embed Wrong!

[@madytyoo]

This is the best channel about Ollama!

[@aurielklasovsky1435]

Wow. I am very surprised that this actually works. It is so bizarre that this technology (LLMs) actually performs better when you tell it what it should be doing. Thank you for the tip! And thank you for telling me not to use llama for embeddings. I absolutely thought that it works better because it is bigger without ever testing anything else. Cheers!

[@conneyk]

Thanks for the video! I‘m working on my own RAGs for some time now. Maybe prefixing would help. What I learned so far is, that RAG is very individual for each use case. Like if you are dealing with code Docs or with large Texts or with multi Line PDFs. Also if your docs aren’t in english embedding models like nomic or other open source are really weak. You first have to translate the docs before embedding them. Than we even haven’t talked about reranking queries, corrective rag to enhance your query with web search results or other docs, hybrid query search based on metadata and docs content, and so on. Also the vector store you using is playing a difference. All this is making it very complex to implement all the combinations and benchmark and test them. I really would love to find some RAG KISS Principles and best practices

[@aurielklasovsky1435]

I am running into the same problem working with none English documents. I think there needs to be a ton of investment done for each language, there is probably no real way around it

[@rundeks]

I never heard of this before. Thank you so much for sharing it!

[@proterotype]

So awesome man. I really appreciate this kind of information

[@marcelgeers3263]

How would you prefix code snippets or unit functions?

[@themax2go]

that is a very good q, i'd like to know. did you find an answer yet?

[@technovangelist]

Prefixes are set by the model not the content

[@ahasani2008]

can't help to notice your Batik shirt, nice one. And the content is excellent as always Matt, thanks

[@technovangelist]

$27 on Amazon. very comfy: geni.us/mhawaii1

[@blackswann9555]

Thank you for sharing ❤

[@sebastianpodesta]

Thanks a lot!!! Great stuff! Quick question, what would you recomend for multilingual data, what happens if the rag data and the user prompts are in Spanish, should I do all system prompts and instructions in Spanish? Or tell it to translate the just answer?

[@sebastianpodesta]

I’m trying to do RAG on n8n using ollama with llama 3.1 chat model and nomic embedding model with mixed results, I get answers some times in English, others in Spanish and some times the model tells me that it didn’t understand the question

[@AlekseyRubtsov]

Thanks!

[@Leo_ai75]

I've just added this to my project folder in an .md file, for an embedding project I was working on, for my Coding assistant to use as context: Embedding Best Practices from Ollama Founding Team: When doing embeddings with Ollama models, you were doing it wrong until now. Adding prefixes to content can make results twice as accurate. Three of the five embedding models in official Ollama Library support prefixes: 1. Nomic embed-text: - Documents: "search_document:" - Queries: "search_query:" - Classification: "classification:" - Clustering: "clustering:" 2. Snowflake & Arctic: - Queries: "represent the sentence for searching relevant passages:" - Documents: No prefix needed 3. Mixed Bread: - Same as Snowflake/Arctic format Implementation: - For vector stores: Add prefix before chunk of text - For similarity search: Add prefix before query - For hosted Nomic API: Use API option - For Ollama: Simply prepend prefix text Testing shows prefixes deliver: - More complete answers - Better document matching - 2x accuracy improvement in many cases This comes directly from Matt Williams, founding Ollama team member. I hope it helps!

[@technovangelist]

I can’t see why you would want to do that

[@Leo_ai75]

@@technovangelist it’s for people who use coding assistants Matt, like copilot, Cursor, Cody etc.

[@technovangelist]

But that’s not something that goes into a prompt. It doesn’t make any sense

[@Leo_ai75]

@@technovangelist What I meant was I used it as an .md file in my project folder for the AI assistant to use as context. My apologies, I realise I said system prompt previously, that was in error.

[@technovangelist]

I still don’t get that. That’s how you need to interact with an embedding model. It’s not something a model would benefit knowing.

[@basterman13]

Thank you for the video, I learned a lot! Could you please advise on best RAG implementation and document splitter for Python? I’ve tried several methods, but I often get mixed results, around 50/50 accuracy. The main issue is with chunking: sometimes, chunks split in a way that separates the beginning of a class or method from its continuation. Is there a way to ensure that chunks belonging to the same file can be grouped or kept together more effectively? Thank you in advance.

[@technovangelist]

That’s what the metadata in most vector databases is for. Describe the source. Then use that in your code to keep similar things together.

[@basterman13]

@@technovangelist Thank you. Yesterday, after I left my comment, I came to the same conclusion. I just need to get distracted sometimes. The answer was always on the surface. I thought maybe there were some more specific approaches, but in this case, the simplest way is the best. Have you heard anything about LightRAG(HKUDS developer)? I'd be interested to hear your thoughts on it.

[@karlfranz2pl]

I havent used any embed models but a while ago I tried to give PDF to llama 3.1 7b and results were between nothing to horrible. Then I tied the same document with llama 3.1 70b and results were actually pretty good. I could not test it really in depth because my PC runs 70b model at almost negative speed :) (please keep in mind I actually don't know what I am doing with thees LLMs :) )

[@NLPprompter]

hi Matt, do you happen to know about contextual RAG by anthropic? does this some how similar with it?

[@raymond_luxury_yacht]

When I created embeddings before I sent to the embedder I got llm to analyse the text and add 10 questions about it added it to the chunk and sent it. Search accuracy was very good

[@Ad434443]

Interesting! I didn't know how big difference the embedding models meant. I have used nomic for RAG. And maybe i have been a bit sloppy, as prefixes I just cursively read about before and didn't implement them in the RAGs. If you have time, Matt, then a video on how to use n8n to do the prefixing ingestion of external docs. I used tagging for filtering and so on, but prefixes does seem very powerful.

[@deucebigs9860]

Liking and subscribed to tell you you're definitely on the right path of what I want to learn!

[@PanayotPanayotov-x6p]

Can you provide articles or links to the documentation?

[@technovangelist]

The docs are in the github repo. You can get to it from ollama.com

[@alexlee1711]

Ollama's running will become slower. The content generation speed does not decrease, and the interval between questions is increasing. It seems that the "question & answer" interval will become longer based on the model with an additional knowledge base. When the knowledge base is not attached, there is no such problem in actual tests.

[@technovangelist]

You already said this on another video. Not sure what your particular situation is. Ollama won’t slow down over time except when there is an app built around it that doesn’t take advantage of it properly. Larger models will take longer than smaller ones but there has been no slow down and some speed ups.

[@agsvk-com]

Thank you for sharing. I'm just wondering how would we be able to select one of the prefixed nomic or prefixed snowflake arctic using one of the vector databases. Is this possible or do we need to do this via typescript or python? All the videos I see doesn't seem to have embeddings using any prefixed models? I'm still learning. It would be really great to have more step by step tutorials on this. 😊 God bless

[@wnicora]

This video opens new perspectives on Rag, tx Could you share links to articles explaining the design and use of prefixes?

[@technovangelist]

Just the docs for each embed model

[@muchainganga9563]

Love this!

[@fabriai]

Excellent stuff, Matt. Thanks for this! Why do you prefer typescript for coding the test over python? Do you run it in node? Have you tried dejó for these tasks?

[@technovangelist]

It doesn’t have all the installation baggage that comes with Python. Python is so brittle and easy to screw up your setup. I use deno to run it usually. I don’t know what dejo is.

[@fabriai]

@@technovangelist Thanks for the answer. It makes sense. Sorry for "dejó", I intended to write "deno" but the Spanish autocorrect in the phone changed it and I didn't notice until your reply. I'm more a nodist by trade than a pythonist, so Deno comes more naturally to me. Is good to know an expert like you uses Typescript on Deno. Will follow you lread. Thank you so much!

[@serikazero128]

@10:49 could've been the perfect time for "Stop, Get some help!" meme :)

[@kasomoru6]

Don't know why, but I feel like I just watched a really convincing A.I.. Great info though.👍

[@paulomtts]

Right on time, I'm just implementing a RAG pipeline!

[@WaldoRochow]

I really struggle with this. Why would this make a difference? I'm not questioning that it does, but why?

[@technovangelist]

It’s how the model was trained to respond.

[@YuryGurevich]

Thanks, Matt!

[@ToddWBucy-lf8yz]

Great I'm refactoring for prefixes now, I'm sure now I need to update training data as well for prefixes Any pre trained models already capable.of using prefixes?

[@technovangelist]

Perhaps you should watch the video. It shows 3 models that use the prefixes.

[@ToddWBucy-lf8yz]

​​@@technovangelistnomic isn't useful when your trying to integrate cypher queries and vector store queries in the same model. I'm try to avoid multiple models for my particular RAG setup.

[@technovangelist]

Avoiding multiple models is asking for lower quality results

[@ToddWBucy-lf8yz]

@@technovangelist yeah you are probably right...at least nomic is small and fast. Someone really needs to create a MoE just for RAG and databases.

[@technovangelist]

embedding models arent something you ask questions to. its just for the embedding to stick into the vector db and find similar results. you still have to use a regular model to get insights into your data.

[@davidtapang6917]

Hey bro! Subscribed!

[@technovangelist]

It’s been 20 years. Wonderful to have you

[@hitmusicworldwide]

I see the Thanka on your wall on the viewer left hand side.

[@technovangelist]

Good eye. From one of my two visits to Nepal. My sister used to run a health care clinic in a town called Jiri for about 20 years.

[@k1chko]

Seems similar to contextual embedding.

[@technovangelist]

Different topics. This was about how to get the embedding model to function correctly.

[@tomwawer5714]

Prefix yay

[@remmask]

Hi Matt. Thank you for these videos. Can we get the source in python?

[@smhanov]

I have 200000 images of things described by llava. But if the user is searching for a single word, like "pants" then the search is too broad. It comes up with people wearing pants, shoes, etc. I'm hoping this prefix method helps a little.

[@ISK_VAGR]

Ok, Matt. All what u just said i knew. However, the question of the million dollars is why bigger models perform bad in embedding?

[@technovangelist]

They aren’t embedding models. Embedding models do embeddings. Regular LLMs don’t do it.

[@jparkerweb]

@@technovangelist in other words, just because something "can" do it doesn't mean it "should" 🤣

[@technovangelist]

But I don’t think that language is strong enough. An embedding model might take 30 seconds when an llm can take 45 minutes and is 10% as effective. It’s bad enough when folks insist on using a 70b model for an answer that is maybe 10% better than an 8b model and wait 3 minutes instead of 30 seconds. That’s not worth it in most cases but there is a debatable benefit. Embedding with an llm make zero sense.

[@jparkerweb]

@@technovangelist oh, I 100% agree! Choose the right tool for the right job

[@ISK_VAGR]

@@technovangelist Matt u may have misunderstood my question. I was interested in why mathematically, a good LLM is not a good embedder. When I started to use RAG I believed that perhaps embedding models were LLMs delivering the output of hidden layers as embeddings. I still wonder why if LLMs can find patterns are not good in providing embeddings for RAG. Cheers..

[@FrankenLab]

The wave of the future doesn't include MORE work to get models to digest our content, it involves models that perform better on their own without coaxing them to give us a marginal improvement in the results. Also, only having 2 models with prefixing doesn't give many options. Great content though, appreciate the effort it takes to research, edit, and produce videos!

[@technovangelist]

Eventually maybe, but not for a long while. It’s still early days for this tech. There are more than 2. 3 were in this video and there are others that can be imported. And 2x in some cases is hardly marginal

[@rv7591]

Well yeah but the future is discovered through experiments.

[@technovangelist]

Yeah but wishing for things doesn’t make them happen

[@ShaunyTravels.]

Wish there was more videos about running ollama on a mobile app I made a chat app using ollama running on a server on my phone with flutter dart but we need more videos to do that 😂

[@grahaml6072]

I had to stop watching unfortunately with that fuzzy text flashing across the screen. Maybe I will just try and read the transcript

[@technovangelist]

I don’t have any fuzzy text on this one. If it’s fuzzy don’t watch at all low rez

[@grahaml6072]

@@technovangelistI am not watching at low resolution. I watched on a 65” OLED. An iPad 12.9” a Samsung 49” widescreen and a 4K UST projector on 120” screen just to check it wasn’t me. It starts at 6:10 when you scroll through your outputs.

[@technovangelist]

oh, you were making a joke...got it....you aren't supposed to read that, which is why i said I am speeding forward.

[@NLPprompter]

ironically we all do AI with fuzzy input output too... better get used to fuzzy mate 😁