Production RAG - Part 5: Images and Multimodal Retrieval

Text retrieval works because both sides of the comparison are text living in one embedding space. An image breaks that symmetry, and the way you restore it is one of the few RAG decisions that is genuinely hard to reverse later. It is also the decision where the cheapest-looking option is usually the expensive one, for a reason that only becomes visible when you separate one-time costs from rec...