zai-org /

GLM-5.3

490 DZD in 1540 DZD out 91 DZD cached/ 1M tokens

GLM-5.3 is Z.ai's flagship coding model, and it makes an unusual argument: it shares its base model entirely with the previous generation. No new pre-training, no larger foundation — every gain comes from post-training alone, and the gains are large. Terminal Bench 3.0 moves from 4.6 to 28.3 on identical weights. Alongside coding, Z.ai reports that cyber capability emerged faster than expected during that scaling, putting the model at the state of the art for vulnerability discovery and more than doubling its predecessor further up the exploitation chain. It holds a one-million-token context with a 128K maximum output, generates roughly three times faster than comparable frontier models, and reasons at three selectable effort levels.