GLM-4.5 X (Z AI)

GLM-4.5 X sits within Z AI's GLM family of large language models, a lineage that the provider positions around bilingual Chinese and English fluency, coding strength, and competitive per-token pricing across its 4.x and 5.x releases. The model is offered through Z AI's own API catalog and inherits the family's text-in, text-out design, with reasoning, tool calling, and temperature control exposed to developers for shaping structured, multi-step behavior in production applications.

In practical terms, GLM-4.5 X is aimed at agentic and developer workloads that benefit from its large the cataloged API limit context window, such as retrieval-augmented generation, long-document summarization, and coding assistants that need to keep substantial codebases or transcripts in view. The cost profile documented through Z AI's published rate card places it as a mid-to-upper tier option in the GLM lineup, between the more economical Flash variants and the newer 5.x reasoning models, making it a reasonable fit for teams standardizing on Z AI infrastructure who want broader capability than entry-level endpoints without stepping up to the latest generation.