Is GPT-4o-mini or GPT-5.1-Codex cheaper?

GPT-4o-mini is cheaper on output tokens ($0.54 vs $9.00 per 1M).

Which has the larger context window, GPT-4o-mini or GPT-5.1-Codex?

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

GPT-4o-mini vs GPT-5.1-Codex

GPT-4o-mini is cheaper on output tokens, while GPT-5.1-Codex offers a larger context window. Choose GPT-4o-mini or GPT-5.1-Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-4o-mini	GPT-5.1-Codex
Provider	Poe	Poe
Input / 1M tokens	$0.14	$1.10
Output / 1M tokens	$0.54	$9.00
Context window	124K	400K
Parameters	—	—
Open weights	No	No
Released	Jul 2024	Nov 2025

GPT-4o-mini 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.