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.
#82 of 89 in Multimodal.
On MIEB English · Compositionality · English, Blip2 Opt 6.7B Coco scores 34.1 vs 34.6 — about the same.
Released 2024-03-31. 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.
Blip2 Opt 6.7B Coco is an open-weights embeddings & retrieval model from Salesforce, released Mar 2024.
Jina Embeddings v5 Omni Small (better), E5 V (open weights).