Embedding + vector query cost for a semantic search feature.
Semantic search queries are cheap; embedding and storing the corpus is where the money goes. Size those on the embeddings calculator and vector database calculator.
Free semantic search cost calculator — searches, embedding and vector-query price to your monthly search bill.
Per query it's cheap: a small embedding of the query plus a vector database lookup. The bigger costs are embedding your entire corpus once (and re-embedding on updates) and storing the vectors.
Not the queries — they're fractions of a cent. It's indexing: embedding a large corpus and paying for vector storage. Budget those, and queries are nearly free.