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.
#136 of 200 in Embeddings.
On MTEB Russian v1.1 · STS · Russian, Ru En RoSBERTa scores 74.1 vs 74.2 — about the same.
Released 2024-07-29. 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.
Ru En RoSBERTa is an open-weights embeddings & retrieval model from ai-forever, released Jul 2024.
Qwen 3 Embedding 8B (better).