There is no per-unit API price: price not verified.
#142 of 200 in Embeddings.
On MTEB English v2 · Retrieval · English, E5 Base 4K scores 41.5 vs 41.7 — about the same.
Released 2024-03-28. It is the current version in its line.
Yes, the weights are open (MIT licence).
The weights are open and can be self-hosted; hardware needs are not confirmed yet.
E5 Base 4K is an open-weights embeddings & retrieval model from dwzhu, released Mar 2024.
EmbeddingGemma 300M (better), Yuan Embedding 2.0 En (open weights).