Is OpenAI GPT 120B or GLM 5.1 cheaper?

OpenAI GPT 120B is cheaper on output tokens ($0.50 vs $4.30 per 1M).

Which has the larger context window, OpenAI GPT 120B or GLM 5.1?

GLM 5.1 has the larger context window (203K tokens).

OpenAI GPT 120B vs GLM 5.1

OpenAI GPT 120B is cheaper on output tokens, while GLM 5.1 offers a larger context window. Choose OpenAI GPT 120B or GLM 5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	OpenAI GPT 120B	GLM 5.1
Provider	Baseten	Baseten
Input / 1M tokens	$0.10	$1.30
Output / 1M tokens	$0.50	$4.30
Context window	128K	203K
Parameters	—	754B
Open weights	Yes	Yes
Released	Aug 2025	Apr 2026

OpenAI GPT 120B details →GLM 5.1 details →

FAQ

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