How to Use GLM-5.1 with OpenClaw via OpenRouter as a Claude Opus Alternative
Zhipu AI released GLM-5.1 on March 27, 2026, and the benchmark numbers are legitimately surprising. On Claude Code’s own coding evaluation, GLM-5.1 scores 45.3 — that’s 94.6% of Claude Opus 4.6’s 47.9. On SWE-bench-Verified, it hits 77.8 (open-source state of the art). On Terminal Bench 2.0, it posts 56.2. And it’s available via OpenRouter at a fraction of Opus pricing. This guide walks you through connecting GLM-5.1 to OpenClaw via OpenRouter and configuring it intelligently for coding-heavy agent workloads. ...