Is GPT 5.2 Codex or GLM 4.5 cheaper?

GLM 4.5 is cheaper on output tokens ($1.30 vs $14.00 per 1M).

Which has the larger context window, GPT 5.2 Codex or GLM 4.5?

GPT 5.2 Codex has the larger context window (400K tokens).

GPT 5.2 Codex vs GLM 4.5

GLM 4.5 is cheaper on output tokens, while GPT 5.2 Codex offers a larger context window. Choose GPT 5.2 Codex or GLM 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT 5.2 Codex	GLM 4.5
Provider	NanoGPT	NanoGPT
Input / 1M tokens	$1.75	$0.30
Output / 1M tokens	$14.00	$1.30
Context window	400K	128K
Parameters	—	355B
Open weights	No	No
Released	Jan 2026	Apr 2025

GPT 5.2 Codex 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.