Is Kimi K2 or Claude Opus 4.1 cheaper?

Kimi K2 is cheaper on output tokens ($2.20 vs $75.00 per 1M).

Which has the larger context window, Kimi K2 or Claude Opus 4.1?

Claude Opus 4.1 has the larger context window (200K tokens).

Kimi K2 vs Claude Opus 4.1

Kimi K2 is cheaper on output tokens, while Claude Opus 4.1 offers a larger context window. Choose Kimi K2 or Claude Opus 4.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Kimi K2	Claude Opus 4.1
Provider	FastRouter	FastRouter
Input / 1M tokens	$0.55	$15.00
Output / 1M tokens	$2.20	$75.00
Context window	131K	200K
Parameters	1T	—
Open weights	Yes	No
Released	Jul 2025	Aug 2025

Kimi K2 details →Claude Opus 4.1 details →

FAQ

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