Reranking for RAG in Python: Cohere, BGE, Jina, and ColBERT Compared (2026)
Benchmark Cohere Rerank 3.5, BGE v2-m3, Jina Reranker v2, and ColBERT v2 for RAG in Python. Runnable code, NDCG@10 results, latency, and $/1M queries so you can pick the right reranker.