There is no per-unit API price: self-host only.
There is no free API. The weights are open, so you can run it yourself.
#139 of 200 in Embeddings.
On MTEB English v2 · Retrieval · English, Sentence Croissant Alpha v0.3 scores 42.6 vs 42.9 — about the same.
Released 2024-04-26. It is the current version in its line.
Yes, the weights are open.
The weights are open and can be self-hosted; hardware needs are not confirmed yet.
Sentence Croissant Alpha v0.3 is an open-weights embeddings & retrieval model from manu, released Apr 2024.
EmbeddingGemma 300M (better), Yuan Embedding 2.0 En (open weights).