GLM 5.2 Fast

GLM 5.2 Fast is the high-throughput counterpart to Zhipu AI's flagship GLM 5.2, designed for workflows where output speed matters as much as quality. It keeps the standard version's capabilities in logical reasoning, long-form comprehension, and code generation, but applies inference acceleration so that generation runs noticeably faster. In third-party hosting benchmarks, the optimized deployment has reached a peak of around 446 tokens per second on Artificial Analysis and has been consistently ranked among the fastest providers on OpenRouter throughput leaderboards, suggesting real-world latency gains rather than just marketing claims.

The practical appeal of GLM 5.2 Fast is its combination of a very large context window with the throughput needed for interactive products. It is well suited to real-time dialogue, multi-turn agent calls, and streaming code generation, where long context and low time-to-first-token both shape the user experience. Open weights mean teams can self-host or run through optimized inference providers, and the model supports tool calling and structured outputs, making it a flexible engine for production assistants, retrieval-heavy pipelines, and developer tooling that benefits from speed without giving up reasoning depth.