Is GPT-5.4 mini or GPT-5.3 Codex cheaper?

GPT-5.4 mini is cheaper on output tokens ($4.50 vs $14.00 per 1M).

Which has the larger context window, GPT-5.4 mini or GPT-5.3 Codex?

Both models offer a similar context window.

GPT-5.4 mini vs GPT-5.3 Codex

GPT-5.4 mini is cheaper on output tokens. Choose GPT-5.4 mini or GPT-5.3 Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-5.4 mini	GPT-5.3 Codex
Provider	LLM Gateway	LLM Gateway
Input / 1M tokens	$0.75	$1.75
Output / 1M tokens	$4.50	$14.00
Context window	400K	400K
Parameters	—	—
Open weights	No	No
Released	Mar 2026	Feb 2026

GPT-5.4 mini 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.