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.

GLM-5.2 from Zhipu AI currently leads the SWE-Marathon leaderboard with a score of 0.130 across 1 evaluated AI models.

About this benchmark

What SWE-Marathon measures

SWE-Marathon is a text benchmark that evaluates large language models on agents and code tasks. LLM Stats tracks 1 model on this benchmark, with a maximum possible score of 1. Current average across reported models is 0.1, with the leader reaching 0.1.

Compare leaders on the best AI for agents and best AI for code leaderboards.

Zhipu AIGLM-5.2 leads with 13.0%.

Progress Over Time

Interactive timeline showing model performance evolution on SWE-Marathon

State-of-the-art frontier
Open
Proprietary

SWE-Marathon Leaderboard

1 models
ContextCostLicense
1
Zhipu AI
Zhipu AI
753B1.0M$1.40 / $4.40
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FAQ

Common questions about SWE-Marathon.

What is the SWE-Marathon benchmark?

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.

What is the SWE-Marathon leaderboard?

The SWE-Marathon leaderboard ranks 1 AI models based on their performance on this benchmark. Currently, GLM-5.2 by Zhipu AI leads with a score of 0.130. The average score across all models is 0.130.

What is the highest SWE-Marathon score?

The highest SWE-Marathon score is 0.130, achieved by GLM-5.2 from Zhipu AI.

How many models are evaluated on SWE-Marathon?

1 models have been evaluated on the SWE-Marathon benchmark, with 0 verified results and 1 self-reported results.

What categories does SWE-Marathon cover?

SWE-Marathon is categorized under agents and code. The benchmark evaluates text models.

What is the best open-source model on SWE-Marathon?

GLM-5.2 by Zhipu AI is the top-ranked open-source model on SWE-Marathon, with a score of 0.130 (rank #1).

Which model offers the best value on SWE-Marathon?

Among models scoring within 10% of the leader, GLM-5.2 from Zhipu AI is the cheapest, at $1.40 per million input tokens with a score of 0.130.

How recent are the SWE-Marathon leaderboard results?

The SWE-Marathon leaderboard was last updated in June 2026 and currently includes 1 evaluated models.

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