GLM 5.2 mxfp4 is a quantized text model running in the mxfp4 format, meaning it trades a small amount of numerical precision for significantly reduced memory footprint and faster inference on compatible hardware. It handles an unusually large context window of over one million tokens, which allows it to process very long documents or conversations in a single pass. The trade-off is that mxfp4 quantization can introduce subtle quality degradation compared to full-precision variants.