Is GLM-5.3 Flash Flex or GLM 5 Fast cheaper?

GLM-5.3 Flash Flex is cheaper on output tokens ($0.33 vs $3.60 per 1M).

Which has the larger context window, GLM-5.3 Flash Flex or GLM 5 Fast?

GLM-5.3 Flash Flex has the larger context window (1M tokens).

GLM-5.3 Flash Flex vs GLM 5 Fast

GLM-5.3 Flash Flex is cheaper on output tokens, while GLM-5.3 Flash Flex offers a larger context window. Choose GLM-5.3 Flash Flex or GLM 5 Fast based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GLM-5.3 Flash Flex	GLM 5 Fast
Provider	Neuralwatt	Neuralwatt
Input / 1M tokens	$0.10	$1.10
Output / 1M tokens	$0.33	$3.60
Context window	1M	203K
Parameters	—	—
Open weights	Yes	Yes
Released	Aug 2026	Apr 2026

GLM-5.3 Flash Flex details →GLM 5 Fast details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.