Is Z.ai: GLM 4.5 or Anthropic: Claude Opus 4.5 cheaper?

Z.ai: GLM 4.5 is cheaper on output tokens ($2.20 vs $25.00 per 1M).

Which has the larger context window, Z.ai: GLM 4.5 or Anthropic: Claude Opus 4.5?

Anthropic: Claude Opus 4.5 has the larger context window (200K tokens).

Z.ai: GLM 4.5 vs Anthropic: Claude Opus 4.5

Z.ai: GLM 4.5 is cheaper on output tokens, while Anthropic: Claude Opus 4.5 offers a larger context window. Choose Z.ai: GLM 4.5 or Anthropic: Claude Opus 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Z.ai: GLM 4.5	Anthropic: Claude Opus 4.5
Provider	Kilo Gateway	Kilo Gateway
Input / 1M tokens	$0.60	$5.00
Output / 1M tokens	$2.20	$25.00
Context window	131K	200K
Parameters	355B	—
Open weights	Yes	No
Released	Jul 2025	Nov 2025

Z.ai: GLM 4.5 details →Anthropic: Claude Opus 4.5 details →

FAQ

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