Is Grok 4 Fast or GLM 4.6 cheaper?

Grok 4 Fast is cheaper on output tokens ($0.50 vs $1.54 per 1M).

Which has the larger context window, Grok 4 Fast or GLM 4.6?

Grok 4 Fast has the larger context window (2M tokens).

Grok 4 Fast vs GLM 4.6

Grok 4 Fast is cheaper on output tokens, while Grok 4 Fast offers a larger context window. Choose Grok 4 Fast or GLM 4.6 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Grok 4 Fast	GLM 4.6
Provider	ZenMux	ZenMux
Input / 1M tokens	$0.20	$0.35
Output / 1M tokens	$0.50	$1.54
Context window	2M	200K
Parameters	—	357B
Open weights	No	No
Released	Sep 2025	Sep 2025

Grok 4 Fast details →GLM 4.6 details →

FAQ

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