Is o4 Mini High or GPT-5.3 Codex cheaper?

o4 Mini High is cheaper on output tokens ($4.40 vs $14.00 per 1M).

Which has the larger context window, o4 Mini High or GPT-5.3 Codex?

GPT-5.3 Codex has the larger context window (400K tokens).

o4 Mini High vs GPT-5.3 Codex

o4 Mini High is cheaper on output tokens, while GPT-5.3 Codex offers a larger context window. Choose o4 Mini High or GPT-5.3 Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	o4 Mini High	GPT-5.3 Codex
Provider	OpenRouter	OpenRouter
Input / 1M tokens	$1.10	$1.75
Output / 1M tokens	$4.40	$14.00
Context window	200K	400K
Parameters	—	—
Open weights	No	No
Released	Apr 2025	Feb 2026

o4 Mini High details →GPT-5.3 Codex details →

FAQ

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