[GUEST ACCESS MODE: Data is scrambled or limited to provide examples. Make requests using your API key to unlock full data. Check https://lunarcrush.ai/auth for authentication information.]

![rryssf_ Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1666103476945031168.png) Robert Youssef [@rryssf_](/creator/twitter/rryssf_) on x 2462 followers
Created: 2025-07-26 10:01:12 UTC

X. How to build your own RAG system

You’ll need:

- Vector DB (Pinecone, Weaviate, FAISS)
- Embedding Model (OpenAI, Hugging Face)
- Retriever (LangChain, BM25)
- Generator (GPT-4, Claude, Mistral)
- Framework (LangChain, LlamaIndex, Haystack)

Stack example:

LangChain + OpenAI + Pinecone + GPT-4


XXXXX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1949047341367050606/c:line.svg)

**Related Topics**
[stack](/topic/stack)
[claude](/topic/claude)
[open ai](/topic/open-ai)

[Post Link](https://x.com/rryssf_/status/1949047341367050606)