Is GPT-4.5 or OpenAI: GPT-5.4 Nano cheaper?

GPT-4.5 and OpenAI: GPT-5.4 Nano have comparable output pricing.

Which has the larger context window, GPT-4.5 or OpenAI: GPT-5.4 Nano?

OpenAI: GPT-5.4 Nano has the larger context window (400K tokens).

GPT-4.5 vs OpenAI: GPT-5.4 Nano

Both have similar output pricing, while OpenAI: GPT-5.4 Nano offers a larger context window. Choose GPT-4.5 or OpenAI: GPT-5.4 Nano based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-4.5	OpenAI: GPT-5.4 Nano
Provider	OpenAI	OpenAI
Input / 1M tokens	—	$0.20
Output / 1M tokens	—	$1.25
Context window	—	400K
Parameters	—	—
Open weights	No	No
Released	Feb 2025	Mar 2026

GPT-4.5 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.