Is OpenAI: GPT-5.1-Codex or OpenAI: GPT-5.4 Nano cheaper?

OpenAI: GPT-5.4 Nano is cheaper on output tokens ($1.25 vs $10.00 per 1M).

Which has the larger context window, OpenAI: GPT-5.1-Codex or OpenAI: GPT-5.4 Nano?

Both models offer a similar context window.

OpenAI: GPT-5.1-Codex vs OpenAI: GPT-5.4 Nano

OpenAI: GPT-5.4 Nano is cheaper on output tokens. Choose OpenAI: GPT-5.1-Codex or OpenAI: GPT-5.4 Nano based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	OpenAI: GPT-5.1-Codex	OpenAI: GPT-5.4 Nano
Provider	OpenAI	OpenAI
Input / 1M tokens	$1.25	$0.20
Output / 1M tokens	$10.00	$1.25
Context window	400K	400K
Parameters	—	—
Open weights	No	No
Released	Nov 2025	Mar 2026

OpenAI: GPT-5.1-Codex details →OpenAI: 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.