Mouse on frontier harness with glm-5.3-flash (mouse.dev)

This week, Z.ai shared community results from their GLM-5.3 and GLM-5.3-Flash models tested against five coding agent harnesses using the FrontierHarness framework. ZCode emerged as the top performer, executing on GLM-5.3 and achieving a passing rate of approximately 82%, while Mouse on GLM-5.3-Flash scored 77% with a significantly lower cost per pass of $0.29. These results demonstrate that while Mouse's performance was just shy of its competitors, it nonetheless presents a much more economical option, costing only a fraction of what others charge per successful task. The significance of these findings lies in the comparative cost-efficiency of newer models in real-world coding tasks, emphasizing the potential for lower-cost AI solutions in software development. With GLM-5.3-Flash offering a median cost of just over a cent per passing task due to its advantageous pricing model, it underlines a trend towards more accessible AI capabilities for developers and organizations. This could pave the way for wider adoption of AI tools in coding environments, especially as developers seek budget-friendly yet effective solutions.