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.
#183 of 200 in Embeddings.
On RTEB German beta · Mean over tasks · German, LaBSE scores 16.6 vs 16.7 — about the same.
Released 2019-11-01. 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.
LaBSE is an open-weights embeddings & retrieval model from sentence-transformers, released Nov 2019.
E5 Base v2 (better), Nemotron 3 Embed 8B BF16 (open weights).