Is Kimi K2 0905 or GPT-5.1-Codex cheaper?

Kimi K2 0905 is cheaper on output tokens ($2.50 vs $10.00 per 1M).

Which has the larger context window, Kimi K2 0905 or GPT-5.1-Codex?

GPT-5.1-Codex has the larger context window (400K tokens).

Kimi K2 0905 vs GPT-5.1-Codex

Kimi K2 0905 is cheaper on output tokens, while GPT-5.1-Codex offers a larger context window. Choose Kimi K2 0905 or GPT-5.1-Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Kimi K2 0905	GPT-5.1-Codex
Provider	ZenMux	ZenMux
Input / 1M tokens	$0.60	$1.25
Output / 1M tokens	$2.50	$10.00
Context window	262K	400K
Parameters	—	—
Open weights	No	No
Released	Sep 2025	Nov 2025

Kimi K2 0905 details →GPT-5.1-Codex details →

FAQ

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