There is no per-unit API price: price not verified.
#93 of 200 in Embeddings.
On MTEB Medical v1 · Reranking · Mandarin Chinese, Stella Base En v2 scores 20.5 vs 20.9 — about the same.
Released 2023-10-19. 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.
Stella Base En v2 is an open-weights embeddings & retrieval model from infgrad, released Oct 2023.
E5 Base v2 (better), Yuan Embedding 2.0 Zh (open weights).