Is GPT-4.1 Nano or GPT-5.1 Codex Max cheaper?

GPT-4.1 Nano is cheaper on output tokens ($0.40 vs $10.00 per 1M).

Which has the larger context window, GPT-4.1 Nano or GPT-5.1 Codex Max?

GPT-4.1 Nano has the larger context window (1M tokens).

GPT-4.1 Nano vs GPT-5.1 Codex Max

GPT-4.1 Nano is cheaper on output tokens, while GPT-4.1 Nano offers a larger context window. Choose GPT-4.1 Nano or GPT-5.1 Codex Max based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-4.1 Nano	GPT-5.1 Codex Max
Provider	Abacus	Abacus
Input / 1M tokens	$0.10	$1.25
Output / 1M tokens	$0.40	$10.00
Context window	1M	400K
Parameters	—	—
Open weights	No	No
Released	Apr 2025	Nov 2025

GPT-4.1 Nano details →GPT-5.1 Codex Max details →

FAQ

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