Multi-SWE-bench C++ (MSWE-agent): leaderboard
The C++ split of Multi-SWE-bench (ByteDance Seed, 2025): 129 human-verified issues from real C++ repositories, which the agent resolves by editing the repository; a fix counts only when the project's tests pass. Scored as the percentage of issues resolved under MSWE-agent, the benchmark team's multilingual port of SWE-agent; higher is better.
Metric: Resolved rate (%). Source: multi-swe-bench.github.io. Saturation forecast: Around 2029. 12 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | Claude 3.7 Sonnet (20250219) | 11.63 | #399 |
| 2 | Gemini 2.5 Pro (Preview 03-25) | 8.53 | #234 |
| 3 | DeepSeek V3 | 7.75 | #705 |
| 4 | Claude 3.5 Sonnet (20241022) | 6.98 | #635 |
| 5 | Llama 4 Maverick | 6.98 | #1105 |
| 6 | DeepSeek R1 | 6.2 | #467 |
| 7 | Doubao-1.5-Pro | 6.2 | #585 |
| 8 | O3 Mini (2025-01-31) (High) | 5.43 | #486 (O3 Mini (2025-01-31)) |
| 9 | O1 (2024-12-17) | 3.88 | #310 |
| 10 | GPT-4o (2024-11-20) | 2.33 | #864 |
| 11 | Qwen 2.5 72B Instruct | 0 | #1093 |
No result here: #1 Claude Fable 5.2, #2 Gemini 4 Carbon, #5 Claude Opus 5.5.
Interactive version: theaggregate.ai/benchmark?slug=multi-swe-bench-c-plus-plus-mswe-agent · How It Works · Data refreshed daily, snapshot 2026-11-12.