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.
#75 of 89 in Multimodal.
On MIEB lite · Compositionality · English, Clip Vit Base Patch16 scores 39.9 vs 40.4 — about the same.
Released 2021-02-26. 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.
Clip Vit Base Patch16 is an open-weights embeddings & retrieval model from OpenAI, released Feb 2021.
LCO Embedding Omni 7B (better).