GLM 5.3 FlashX

GLM 5.3 FlashX is Z.ai's high-speed variant of GLM 5.3 Flash, a native multimodal model built on hybrid sparse and linear attention architecture.

Strengths

Delivers inference speeds up to 200 tokens/s while maintaining support for text, image, and video inputs across a 1M-token context window.

Best for

Workloads requiring fast multimodal inference on coding tasks, long-horizon agent processes, and extended document handling where speed is the priority.

Limitations

As an optimized speed variant, it trades some capability depth compared to the full GLM 5.3 foundation model; use GLM 5.3 if reasoning complexity outweighs latency concerns.