Z.ai: GLM 5.2

GLM 5.2 from Z.ai is a text-only model with a context window of roughly one million tokens and a maximum output of 262,000 tokens, making it suited for tasks involving long documents or extended generation. It supports tool use and reasoning, which opens it to agentic workflows and multi-step problem solving. Structured output support is unconfirmed, so teams with strict schema requirements should verify before committing. On pricing, GLM 5.2 sits at $1.40 per million input tokens and $4.40 per million output tokens, which is a mid-range cost relative to the broader market. The more significant caveat is that it carries no independent benchmark coverage, so there is no public third-party evidence of its performance on standard tasks. Buyers who can run their own evaluations and who need a long-context, tool-capable model may find it worth testing, but anyone relying on benchmark comparisons to shortlist models should note that this one is currently unproven on that front.