Contextual AI
AI company whose researchers published BlitzRank, a token-efficient LLM reranking algorithm, and released it as open source.
- GitHub: https://github.com/ContextualAI
Notable Contributions
BlitzRank (2026) — reranking by tournament graphs. Each listwise LLM call is read as a full set of pairwise preferences, and transitivity fills in the rest. Averaged over 14 TREC DL/BEIR sets and two LLMs, it matched a pairwise LLM reranker’s quality at roughly one-eighth of the tokens. Code: https://github.com/ContextualAI/BlitzRank (MIT).