GLM 5.3 Flash is a model from Z.ai. Its posted API price is $0.15 per 1M input tokens and $0.50 per 1M output tokens, or $0.24 per 1M tokens blending 3 input tokens with 1 output token. Its price has not changed since Aug 26, 2026. It carries 69.6% of Z.ai's API tokens and is one of the 3 models in the Z.ai token price index, $0.82 per 1M tokens today. Of the 30 models in the token index it is the 23rd most expensive. At today's H100 rental price of $3.69 per GPU-hour, its break-even throughput is 4,311 tokens per second per GPU. Prices are collected once a day, for each UTC day.