Reranking just got cheaper
Top-quality reranking got about four fifths cheaper in a month. Perplexity's pplx-decider-v1.2 as a BEIR reranker: asked to choose among 30 documents it is statistically level with Mixedbread v3.1 listwise at 0.511 mean nDCG@10 for $0.20 per 1,000 queries from billed usage, and beats Jev. The flash model matches Jev at $0.10.
