Is GPT-5.5 Instant or GLM 4.6 cheaper?

GLM 4.6 is cheaper on output tokens ($1.54 vs $30.00 per 1M).

Which has the larger context window, GPT-5.5 Instant or GLM 4.6?

GPT-5.5 Instant has the larger context window (400K tokens).

GPT-5.5 Instant vs GLM 4.6

GLM 4.6 is cheaper on output tokens, while GPT-5.5 Instant offers a larger context window. Choose GPT-5.5 Instant or GLM 4.6 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-5.5 Instant	GLM 4.6
Provider	ZenMux	ZenMux
Input / 1M tokens	$5.00	$0.35
Output / 1M tokens	$30.00	$1.54
Context window	400K	200K
Parameters	—	357B
Open weights	No	No
Released	May 2026	Sep 2025

GPT-5.5 Instant details →GLM 4.6 details →

FAQ

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