Is GLM-4.5 or GPT-5.5 Pro cheaper?

GLM-4.5 is cheaper on output tokens ($2.20 vs $180.00 per 1M).

Which has the larger context window, GLM-4.5 or GPT-5.5 Pro?

GPT-5.5 Pro has the larger context window (1.1M tokens).

GLM-4.5 vs GPT-5.5 Pro

GLM-4.5 is cheaper on output tokens, while GPT-5.5 Pro offers a larger context window. Choose GLM-4.5 or GPT-5.5 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GLM-4.5	GPT-5.5 Pro
Provider	OrcaRouter	OrcaRouter
Input / 1M tokens	$0.60	$30.00
Output / 1M tokens	$2.20	$180.00
Context window	131K	1.1M
Parameters	355B	—
Open weights	Yes	No
Released	Jul 2025	Apr 2026

GLM-4.5 details →GPT-5.5 Pro details →

FAQ

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