Zerank 1 vs Voyage AI Rerank 2.5 Lite
Detailed comparison between Zerank 1 and Voyage AI Rerank 2.5 Lite. See which reranker best meets your accuracy and performance needs.
Model Comparison
Zerank 1 takes the lead.
Both Zerank 1 and Voyage AI Rerank 2.5 Lite 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 132 higher ELO rating
- Voyage AI Rerank 2.5 Lite is 519ms faster on average
- Zerank 1 has a 12.5% higher win rate
Overview
Key metrics
ELO Rating
Overall ranking quality
Zerank 1
Voyage AI Rerank 2.5 Lite
Win Rate
Head-to-head performance
Zerank 1
Voyage AI Rerank 2.5 Lite
Accuracy (nDCG@10)
Ranking quality metric
Zerank 1
Voyage AI Rerank 2.5 Lite
Average Latency
Response time
Zerank 1
Voyage AI Rerank 2.5 Lite
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 | Zerank 1 | Voyage AI Rerank 2.5 Lite | Description |
|---|---|---|---|
| Overall Performance | |||
| ELO Rating | 1642 | 1510 | Overall ranking quality based on pairwise comparisons |
| Win Rate | 62.9% | 50.4% | Percentage of comparisons won against other models |
| Pricing & Availability | |||
| Price per 1M tokens | $0.025 | $0.020 | Cost per million tokens processed |
| Release Date | 2025-07-10 | 2025-08-11 | Model release date |
| Accuracy Metrics | |||
| Avg nDCG@10 | 0.676 | 0.679 | Normalized discounted cumulative gain at position 10 |
| Performance Metrics | |||
| Avg Latency | 1126ms | 607ms | Average response time across all datasets |
Dataset Performance
By field
Comprehensive comparison of accuracy metrics (nDCG, Recall) and latency percentiles for each benchmark dataset.
FiQa
| Metric | Zerank 1 | Voyage AI Rerank 2.5 Lite | Description |
|---|---|---|---|
| Accuracy Metrics | |||
| nDCG@5 | 0.115 | 0.111 | Ranking quality at top 5 results |
| nDCG@10 | 0.121 | 0.122 | Ranking quality at top 10 results |
| Recall@5 | 0.105 | 0.103 | % of relevant docs in top 5 |
| Recall@10 | 0.125 | 0.135 | % of relevant docs in top 10 |
| Latency Metrics | |||
| Mean | 995ms | 686ms | Average response time |
| P50 | 992ms | 611ms | 50th percentile (median) |
| P90 | 1124ms | 829ms | 90th percentile |
PG
| Metric | Zerank 1 | Voyage AI Rerank 2.5 Lite | Description |
|---|---|---|---|
| Accuracy Metrics | |||
| Latency Metrics | |||
| Mean | 1238ms | 637ms | Average response time |
| P50 | 1217ms | 614ms | 50th percentile (median) |
| P90 | 1316ms | 817ms | 90th percentile |
business reports
| Metric | Zerank 1 | Voyage AI Rerank 2.5 Lite | Description |
|---|---|---|---|
| Accuracy Metrics | |||
| Latency Metrics | |||
| Mean | 1072ms | 580ms | Average response time |
| P50 | 1070ms | 607ms | 50th percentile (median) |
| P90 | 1273ms | 816ms | 90th percentile |
MSMARCO
| Metric | Zerank 1 | Voyage AI Rerank 2.5 Lite | Description |
|---|---|---|---|
| Accuracy Metrics | |||
| nDCG@5 | 0.967 | 0.981 | Ranking quality at top 5 results |
| nDCG@10 | 0.971 | 0.983 | Ranking quality at top 10 results |
| Recall@5 | 0.987 | 0.993 | % of relevant docs in top 5 |
| Recall@10 | 0.993 | 1.000 | % of relevant docs in top 10 |
| Latency Metrics | |||
| Mean | 1005ms | 542ms | Average response time |
| P50 | 993ms | 611ms | 50th percentile (median) |
| P90 | 1071ms | 635ms | 90th percentile |
DBPedia
| Metric | Zerank 1 | Voyage AI Rerank 2.5 Lite | Description |
|---|---|---|---|
| Accuracy Metrics | |||
| nDCG@5 | 0.715 | 0.692 | Ranking quality at top 5 results |
| nDCG@10 | 0.747 | 0.763 | Ranking quality at top 10 results |
| Recall@5 | 0.064 | 0.064 | % of relevant docs in top 5 |
| Recall@10 | 0.103 | 0.111 | % of relevant docs in top 10 |
| Latency Metrics | |||
| Mean | 1085ms | 555ms | Average response time |
| P50 | 1036ms | 605ms | 50th percentile (median) |
| P90 | 1243ms | 664ms | 90th percentile |
Explore More
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