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

GPT-5.4 nano is cheaper on output tokens ($1.25 vs $14.00 per 1M).

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

Both models offer a similar context window.

GPT-5.3 Codex vs GPT-5.4 nano

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

Spec	GPT-5.3 Codex	GPT-5.4 nano
Provider	GitHub Copilot	GitHub Copilot
Input / 1M tokens	$1.75	$0.20
Output / 1M tokens	$14.00	$1.25
Context window	400K	400K
Parameters	—	—
Open weights	No	No
Released	Feb 2026	Mar 2026

GPT-5.3 Codex details →GPT-5.4 nano details →

FAQ

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