Is GLM-5.3 Marathon or o3-pro cheaper?

GLM-5.3 Marathon is cheaper on output tokens ($4.40 vs $40.00 per 1M).

Which has the larger context window, GLM-5.3 Marathon or o3-pro?

GLM-5.3 Marathon has the larger context window (5M tokens).

GLM-5.3 Marathon vs o3-pro

GLM-5.3 Marathon is cheaper on output tokens, while GLM-5.3 Marathon offers a larger context window. Choose GLM-5.3 Marathon or o3-pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GLM-5.3 Marathon	o3-pro
Provider	Subconscious	Abacus
Input / 1M tokens	$1.40	$20.00
Output / 1M tokens	$4.40	$40.00
Context window	5M	200K
Parameters	—	—
Open weights	Yes	No
Released	Aug 2026	Jun 2025

GLM-5.3 Marathon details →o3-pro details →

FAQ

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