GLM (latest) on Privatemode AI is the alias for GLM-5.3, an open-weights large language model intended for general-purpose text generation, reasoning, and tool-based workflows. According to Privatemode's v1.55.0 changelog, this entry replaced the earlier GLM-5.2 preview, which is now deprecated and automatically routes to GLM-5.3 pending future removal. The model can be addressed either as glm-5.3 for an explicit version pin or as glm-latest for an always-current pointer, giving integrators a straightforward migration path from the previous 5.2 line.

For practical use, GLM-5.3 behaves as a reasoning-capable model with one notable operational constraint: the reasoning_effort=none option is not supported, and requests using that value are silently remapped to reasoning_effort=max, so reasoning behavior cannot be switched off through that parameter. Z.ai documentation summarized by a third-party reviewer also describes GLM-5.3 as supporting long context windows, streaming output, tool calls, and structured output across OpenAI-compatible endpoints, which makes it a reasonable fit for agent-style applications, multi-step problem solving, and structured data extraction tasks where continuous reasoning is acceptable.