Is Grok 4.20 Reasoning or GLM 4.5 cheaper?

GLM 4.5 is cheaper on output tokens ($2.20 vs $2.50 per 1M).

Which has the larger context window, Grok 4.20 Reasoning or GLM 4.5?

Grok 4.20 Reasoning has the larger context window (2M tokens).

Grok 4.20 Reasoning vs GLM 4.5

GLM 4.5 is cheaper on output tokens, while Grok 4.20 Reasoning offers a larger context window. Choose Grok 4.20 Reasoning or GLM 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Grok 4.20 Reasoning	GLM 4.5
Provider	Vercel AI Gateway	Vercel AI Gateway
Input / 1M tokens	$1.25	$0.60
Output / 1M tokens	$2.50	$2.20
Context window	2M	128K
Parameters	—	355B
Open weights	No	Yes
Released	Mar 2026	Jul 2025

Grok 4.20 Reasoning details →GLM 4.5 details →

FAQ

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