There is no per-unit API price: API price not public.
There is no free API. The weights are open, so you can run it yourself.
#147 of 200 in Embeddings.
On MTEB Spanish v1 · STS · multilingual (2 languages), Mmlw Roberta Base scores 61.4 vs 61.5 — about the same.
Released 2023-11-17. It is the current version in its line.
Yes, the weights are open (Apache-2.0 licence).
The weights are open and can be self-hosted; hardware needs are not confirmed yet.
Mmlw Roberta Base is an open-weights embeddings & retrieval model from sdadas, released Nov 2023.
E5 Base v2 (better), Jina Embeddings v5 Text Small (open weights).