Is GPT-5.1 Codex mini or Kimi K2.5 cheaper?

GPT-5.1 Codex mini is cheaper on output tokens ($2.00 vs $3.00 per 1M).

Which has the larger context window, GPT-5.1 Codex mini or Kimi K2.5?

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

GPT-5.1 Codex mini vs Kimi K2.5

GPT-5.1 Codex mini is cheaper on output tokens, while GPT-5.1 Codex mini offers a larger context window. Choose GPT-5.1 Codex mini or Kimi K2.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-5.1 Codex mini	Kimi K2.5
Provider	OrcaRouter	OrcaRouter
Input / 1M tokens	$0.25	$0.60
Output / 1M tokens	$2.00	$3.00
Context window	400K	262K
Parameters	—	1T
Open weights	No	Yes
Released	Nov 2025	Jan 2026

GPT-5.1 Codex mini details →Kimi K2.5 details →

FAQ

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