Enhanced reranker and updated corresponding docs

2025-09-11 02:33:55 +05:30
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+---
+title: Overview
+icon: "arrow-up-arrow-down"
+iconType: "solid"
+---
+
+Mem0 includes built-in support for various reranking providers to improve the relevance of memory search results. Rerankers post-process initial vector search results by re-scoring and re-ordering them using more sophisticated relevance models.
+
+## Usage
+
+To use a reranker, you must provide a `rerank` configuration section in your memory config. If no reranker is configured, search results will rely on vector similarity scoring alone.
+
+For comprehensive configuration parameters for each reranker, please refer to [Config](./config).
+
+## How Reranking Works
+
+1. **Initial Search**: Vector similarity search retrieves candidate memories
+2. **Reranking**: Selected reranker re-scores candidates using advanced models
+3. **Final Results**: Re-ordered results with both vector and rerank scores
+
+<Note>
+Reranking operates as a post-processing step and can significantly improve search relevance at the cost of additional latency and API calls.
+</Note>
+
+## Supported Rerankers
+
+See the list of supported rerankers below.
+
+<CardGroup cols={2}>
+  <Card title="Zero Entropy" href="/components/rerankers/models/zero_entropy" />
+  <Card title="Cohere" href="/components/rerankers/models/cohere" />
+  <Card title="Sentence Transformer" href="/components/rerankers/models/sentence_transformer" />
+  <Card title="LLM-based" href="/components/rerankers/models/llm" />
+</CardGroup>
+
+## When to Use Reranking
+
+- **Improved Relevance**: When vector search alone doesn't provide sufficiently relevant results
+- **Domain-Specific Queries**: For specialized terminology or context that benefits from advanced models
+- **Quality vs Speed Trade-off**: When you can accept higher latency for better search quality
+- **Production Systems**: Where search quality directly impacts user experience
+
+Choose the reranker that best fits your use case:
+- **Zero Entropy**: Best balance of speed and quality for general use
+- **Cohere**: Enterprise-grade with excellent multilingual support  
+- **Sentence Transformer**: Local deployment for privacy-sensitive applications
+- **LLM-based**: Maximum customization with custom prompts and logic