# Preprint reports open-weight software-repair agent results on SWE-bench

_Tuesday, August 18, 2026 at 12:00 AM EDT · Science, AI · Latest · Tier 2 — Notable_

An arXiv preprint describes Kozuchi Agent, an open-weight software-repair agent and CI-operated evaluation pipeline. Using a locally hosted Qwen3.5-27B model without fine-tuning and test-time selection, the authors report resolving 374 of 500 SWE-bench Verified instances on the official evaluator. They also report 41 of 128 Java instances on Multi-SWE-bench, while identifying semantic correctness, Java harness issues and selection errors as remaining failure sources.

## Sources

- [cs.AI updates on arXiv.org](https://arxiv.org/abs/2608.15579)

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