Is GPT-5.1 (2025-11-13) or GLM 4.5 cheaper?

GLM 4.5 is cheaper on output tokens ($1.30 vs $10.00 per 1M).

Which has the larger context window, GPT-5.1 (2025-11-13) or GLM 4.5?

GPT-5.1 (2025-11-13) has the larger context window (1M tokens).

GPT-5.1 (2025-11-13) vs GLM 4.5

GLM 4.5 is cheaper on output tokens, while GPT-5.1 (2025-11-13) offers a larger context window. Choose GPT-5.1 (2025-11-13) or GLM 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-5.1 (2025-11-13)	GLM 4.5
Provider	NanoGPT	NanoGPT
Input / 1M tokens	$1.25	$0.30
Output / 1M tokens	$10.00	$1.30
Context window	1M	128K
Parameters	—	355B
Open weights	No	No
Released	Nov 2025	Apr 2025

GPT-5.1 (2025-11-13) 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.