GLM-5.1 API

GLM-5.1 is Zhipu's latest flagship model, featuring significantly enhanced coding capabilities and markedly improved performance on long-context tasks. It can work continuously and autonomously for up to 8 hours in a single task, completing the full cycle from planning and execution to iterative optimization, and delivering engineering-grade results.

In terms of general capabilities and coding performance, GLM-5.1 is on par with Claude Opus 4.6 overallIt demonstrates stronger sustained performance in long-horizon autonomous execution, complex engineering optimization, and real-world development scenarios, making it an ideal foundation for building Autonomous Agents and long-horizon Coding Agents.