Multi-SWE-bench C (MagentLess): leaderboard
The C split of Multi-SWE-bench (ByteDance Seed, 2025): 128 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 MagentLess, the benchmark team's multilingual port of Agentless; higher is better.
Metric: Resolved rate (%). Source: multi-swe-bench.github.io. Saturation forecast: Around 2028. 12 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | Gemini 2.5 Pro (Preview 03-25) | 9.38 | #234 |
| 2 | Claude 3.7 Sonnet (20250219) | 6.25 | #399 |
| 3 | Llama 4 Maverick | 3.91 | #1105 |
| 4 | DeepSeek V3 | 3.12 | #705 |
| 5 | O1 (2024-12-17) | 3.12 | #310 |
| 6 | O3 Mini (2025-01-31) (High) | 2.34 | #486 (O3 Mini (2025-01-31)) |
| 7 | Qwen 2.5 72B Instruct | 1.56 | #1093 |
| 8 | GPT-4o (2024-11-20) | 1.56 | #864 |
| 9 | Claude 3.5 Sonnet (20241022) | 0.78 | #635 |
| 10 | DeepSeek R1 | 0.78 | #467 |
| 11 | Doubao-1.5-Pro | 0.78 | #585 |
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-magentless · How It Works · Data refreshed daily, snapshot 2026-11-12.