GLM-5.3-Flash

GLM-5.3-Flash is a text chat model developed by Z AI (the team behind the GLM series). The "Flash" suffix marks it as a lighter-weight member of the GLM 5.3 generation, intended for workloads where responsiveness and serving cost matter more than maximum capability. As with other Flash-tier GLM releases, it sits below the larger models in the same generation rather than replacing them. Third-party measurements from Artificial Analysis place GLM-5.3-Flash at roughly 49 output tokens per second with a time to first token of about 1,180 ms. That combination — moderate streaming throughput with just over a second of initial latency — makes it usable for interactive chat and streaming interfaces, though the TTFT figure is higher than the fastest-responding endpoints in the market. Measured speed varies by provider, region, prompt length, and load, so figures observed in production may differ from benchmark conditions. We do not currently track a confirmed context window, modality list, or standard reasoning/coding benchmark scores for GLM-5.3-Flash, so buyers evaluating it for a specific task should verify those details against the serving provider's documentation. In practice, Flash-tier models in the GLM family are typically deployed for high-request-volume text work — summarization, classification, extraction, chat assistants — where a smaller model is run at scale instead of routing every request to a larger sibling. Compare the providers listed in the pricing table on this page, since throughput and cost for the same model can differ substantially between hosts.