Is GLM-5 or GPT-5.1 cheaper?

GLM-5 and GPT-5.1 have comparable output pricing.

Which has the larger context window, GLM-5 or GPT-5.1?

GPT-5.1 has the larger context window (400K tokens).

GLM-5 vs GPT-5.1

Both have similar output pricing, while GPT-5.1 offers a larger context window. Choose GLM-5 or GPT-5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GLM-5	GPT-5.1
Provider	Z.ai (Zhipu AI)	Poe
Input / 1M tokens	—	$1.10
Output / 1M tokens	—	$9.00
Context window	—	400K
Parameters	744B	—
Open weights	Yes	No
Released	Feb 2026	Nov 2025

GLM-5 details →GPT-5.1 details →

FAQ

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