Defects4J: leaderboard
Defects4J: Evaluates software-engineering agents on realistic issue resolution, repository navigation, testing, or maintenance workflows.
Metric: Defects4J Plausible @1 (self-reported). Source: benchmarklist.com. Status: saturated. 35 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | O4 Mini (2025-04-16) (High) | 53.8 |
| 2 | O3 Mini (2025-01-31) (High) | 48.8 |
| 3 | Claude 3.7 Sonnet (20250219) | 47.8 |
| 4 | DeepSeek R1 | 47.5 |
| 5 | GPT-4.1 | 45.2 |
| 6 | Claude 3.5 Sonnet (20241022) | 44.1 |
| 7 | Gemini 2.5 Flash (Preview 05-20) | 43.4 |
| 8 | DeepSeek V3 (0324) | 43 |
| 9 | Claude 3.5 Sonnet (20240620) | 41.5 |
| 10 | Gemini 2.5 Pro (Preview 03-25) | 41.4 |
| 11 | DeepSeek V3 | 39.9 |
| 12 | Gemini 1.5 Pro (002) | 36.4 |
| 13 | GPT-4o (2024-11-20) | 35 |
| 14 | Mistral Medium 3 | 34.9 |
| 15 | GPT-4o (2024-08-06) | 34.1 |
Interactive version: theaggregate.ai/benchmark?slug=defects4j · How It Works · Data refreshed daily, snapshot 2026-09-05.