agents benchmark
SWE-Marathon
SWE-Marathon is an ultra-long-horizon software engineering benchmark covering tasks such as building compilers, optimizing kernels, and developing production-grade services. It measures whether agents can sustain quality across extremely long engineering trajectories.
Updated Aug 11, 2026
Models3
Model coverage3
MetricScore
EvidenceB
SWE-Marathon Ranking
Higher score ranks better on this benchmark.
| 1 | MA | 42.0% | 100.0% | 3 | C | |
| 2 | XA | 29.0% | 50.0% | 3 | C | |
| 3 | ZA | 13.0% | 0.0% | 3 | C |
SWE-Marathon Score Distribution
A closer view of the leading scores on this benchmark.
SWE-Marathon Highlights
The leading models and scores on this benchmark.
What is SWE-Marathon?
What SWE-Marathon measures and how its scores work.
SWE-Marathon is an ultra-long-horizon software engineering benchmark covering tasks such as building compilers, optimizing kernels, and developing production-grade services. It measures whether agents can sustain quality across extremely long engineering trajectories.
Scores are shown in ratio. This benchmark is not independently verified and has an evidence level of B.
- Family
- SWE-Marathon
- Modality
- text
- Primary category
- agents
- Score direction
- higher
- LLMBoard eligible
- Yes
- Evaluation key
- swe-marathon|llm-stats-current
Benchmark scores retain their original unit. Overall score eligibility is shown separately.
FAQ
Common questions about SWE-Marathon.
Which model scores highest on SWE-Marathon?
Kimi K3 is currently ranked first with 42.0%.
What does SWE-Marathon measure?
SWE-Marathon is an ultra-long-horizon software engineering benchmark covering tasks such as building compilers, optimizing kernels, and developing production-grade services. It measures whether agents can sustain quality across extremely long engineering trajectories.
Is a higher score better?
Yes. Higher values rank better for this benchmark.
How many models are compared?
3 model results are currently shown.
Does this benchmark affect the overall score?
Yes. This benchmark can contribute to the current LLMBoard capability score.