Voyage AI Rerank 2.5 Lite vs Zerank 1
Detailed comparison between Voyage AI Rerank 2.5 Lite and Zerank 1. See which reranker best meets your accuracy and performance needs.
Model Comparison
Zerank 1 takes the lead.
Both Voyage AI Rerank 2.5 Lite and Zerank 1 are powerful reranking models designed to improve retrieval quality in RAG applications. However, their performance characteristics differ in important ways.
Why Zerank 1:
- Zerank 1 has 213 higher ELO rating
- Voyage AI Rerank 2.5 Lite is 632ms faster on average
- Zerank 1 has a 29.2% higher win rate
Overview
Key metrics
ELO Rating
Overall ranking quality
Voyage AI Rerank 2.5 Lite
Zerank 1
Win Rate
Head-to-head performance
Voyage AI Rerank 2.5 Lite
Zerank 1
Accuracy (nDCG@10)
Ranking quality metric
Voyage AI Rerank 2.5 Lite
Zerank 1
Average Latency
Response time
Voyage AI Rerank 2.5 Lite
Zerank 1
Visual Performance Analysis
Performance
ELO Rating Comparison
Win/Loss/Tie Breakdown
Accuracy Across Datasets (nDCG@10)
Latency Distribution (ms)
Breakdown
How the models stack up
| Metric | Voyage AI Rerank 2.5 Lite | Zerank 1 | Description |
|---|---|---|---|
| Overall Performance | |||
| ELO Rating | 1392 | 1605 | Overall ranking quality based on pairwise comparisons |
| Win Rate | 33.9% | 63.1% | Percentage of comparisons won against other models |
| Accuracy Metrics | |||
| Avg nDCG@10 | 0.500 | 0.493 | Normalized discounted cumulative gain at position 10 |
| Performance Metrics | |||
| Avg Latency | 624ms | 1256ms | Average response time across all datasets |
Dataset Performance
By field
Comprehensive comparison of accuracy metrics (nDCG, Recall) and latency percentiles for each benchmark dataset.
BEIR/fiqa
| Metric | Voyage AI Rerank 2.5 Lite | Zerank 1 | Description |
|---|---|---|---|
| Accuracy Metrics | |||
| nDCG@5 | 0.111 | 0.115 | Ranking quality at top 5 results |
| nDCG@10 | 0.122 | 0.121 | Ranking quality at top 10 results |
| Recall@5 | 0.103 | 0.105 | % of relevant docs in top 5 |
| Recall@10 | 0.135 | 0.125 | % of relevant docs in top 10 |
| Latency Metrics | |||
| Mean | 592ms | 1172ms | Average response time |
| P50 | 610ms | 1179ms | 50th percentile (median) |
| P90 | 770ms | 1326ms | 90th percentile |
BEIR/scifact
| Metric | Voyage AI Rerank 2.5 Lite | Zerank 1 | Description |
|---|---|---|---|
| Accuracy Metrics | |||
| nDCG@5 | 0.862 | 0.863 | Ranking quality at top 5 results |
| nDCG@10 | 0.877 | 0.866 | Ranking quality at top 10 results |
| Recall@5 | 0.892 | 0.916 | % of relevant docs in top 5 |
| Recall@10 | 0.930 | 0.920 | % of relevant docs in top 10 |
| Latency Metrics | |||
| Mean | 642ms | 1358ms | Average response time |
| P50 | 618ms | 1287ms | 50th percentile (median) |
| P90 | 816ms | 1571ms | 90th percentile |
PG
| Metric | Voyage AI Rerank 2.5 Lite | Zerank 1 | Description |
|---|---|---|---|
| Accuracy Metrics | |||
| Latency Metrics | |||
| Mean | 637ms | 1238ms | Average response time |
| P50 | 614ms | 1217ms | 50th percentile (median) |
| P90 | 817ms | 1316ms | 90th percentile |
Explore More
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