Is Grok 4.20 or GLM 4.5 cheaper?

GLM 4.5 is cheaper on output tokens ($1.30 vs $6.00 per 1M).

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

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

Grok 4.20 vs GLM 4.5

GLM 4.5 is cheaper on output tokens, while Grok 4.20 offers a larger context window. Choose Grok 4.20 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	GLM 4.5
Provider	NanoGPT	NanoGPT
Input / 1M tokens	$2.00	$0.30
Output / 1M tokens	$6.00	$1.30
Context window	2M	128K
Parameters	500B	355B
Open weights	No	No
Released	Mar 2026	Apr 2025

Grok 4.20 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.