GLM-5

GLM-5 sits at the foundation of Z.ai's GLM-5 model line, with the creator publishing the family under an MIT open-source license and hosting the codebase in the zai-org GLM-5 GitHub repository. Within the released lineup, GLM-5 occupies the original base position, followed by GLM-5.1, GLM-5.2, and GLM-5.3 as documented successors that extend its capabilities. The model family is positioned around text-based reasoning and developer workflows, consistent with the coding and long-horizon agent trajectory that later versions in the line were specifically built to serve.

Practical information about GLM-5 itself is limited in the available sources, since the official release notes cover only its successors. What can be said with confidence is that the GLM-5 line evolved toward long-horizon coding and agent tasks, with later versions introducing sparse-attention innovations such as IndexShare for efficient long-context processing and post-training stacks like SAO and slime for large-scale reinforcement learning on agent environments. Developers approaching GLM-5 should treat it as the open-weight entry point of this progression, with the understanding that newer GLM-5.x releases represent the current frontier of the family's coding and long-context capabilities.