Is GLM-5 or GPT-5.5 cheaper?

GLM-5 is cheaper on output tokens ($3.15 vs $30.00 per 1M).

Which has the larger context window, GLM-5 or GPT-5.5?

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

GLM-5 vs GPT-5.5

GLM-5 is cheaper on output tokens, while GPT-5.5 offers a larger context window. Choose GLM-5 or GPT-5.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GLM-5	GPT-5.5
Provider	FastRouter	FastRouter
Input / 1M tokens	$0.95	$5.00
Output / 1M tokens	$3.15	$30.00
Context window	205K	1.1M
Parameters	744B	—
Open weights	Yes	No
Released	Feb 2026	Apr 2026

GLM-5 details →GPT-5.5 details →

FAQ

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