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doc: add ZeroEntropy reranker to models.md (#489)

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Nicolò Boschi 2026-03-04 13:28:25 +01:00 committed by GitHub
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hindsight-docs/docs/developer/models.md
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@ -423,9 +423,11 @@ Reranks initial search results to improve precision.
|----------|-------------|----------|
| `local` | SentenceTransformers CrossEncoder (default) | Development, low latency |
| `cohere` | Cohere rerank API | Production, high quality |
| `zeroentropy` | ZeroEntropy rerank API (zerank-2) | Production, state-of-the-art accuracy |
| `tei` | HuggingFace Text Embeddings Inference | Production, self-hosted |
| `flashrank` | FlashRank (lightweight, fast) | Resource-constrained environments |
| `litellm` | LiteLLM proxy (unified gateway) | Multi-provider setups |
| `litellm-sdk` | LiteLLM SDK (direct API, no proxy) | Multi-provider, simpler setup |
| `rrf` | RRF-only (no neural reranking) | Testing, minimal resources |
### Local Models
@ -443,6 +445,13 @@ Reranks initial search results to improve precision.
| `rerank-english-v3.0` | English text |
| `rerank-multilingual-v3.0` | 100+ languages |
### ZeroEntropy Models
| Model | Use Case |
|-------|----------|
| `zerank-2` | Flagship multilingual reranker (default) |
| `zerank-2-small` | Faster, lighter variant |
### LiteLLM Supported Providers
LiteLLM supports multiple reranking providers via the `/rerank` endpoint:
@ -467,6 +476,11 @@ export HINDSIGHT_API_RERANKER_PROVIDER=cohere
export HINDSIGHT_API_COHERE_API_KEY=your-api-key
export HINDSIGHT_API_RERANKER_COHERE_MODEL=rerank-english-v3.0
# ZeroEntropy (state-of-the-art accuracy)
export HINDSIGHT_API_RERANKER_PROVIDER=zeroentropy
export HINDSIGHT_API_RERANKER_ZEROENTROPY_API_KEY=your-api-key
export HINDSIGHT_API_RERANKER_ZEROENTROPY_MODEL=zerank-2 # default, can omit
# TEI (self-hosted)
export HINDSIGHT_API_RERANKER_PROVIDER=tei
export HINDSIGHT_API_RERANKER_TEI_URL=http://localhost:8081