GPT-4.1 Nano vs GPT-5 Nano
Both have similar output pricing, while GPT-4.1 Nano offers a larger context window. Choose GPT-4.1 Nano or GPT-5 Nano based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-4.1 Nano | GPT-5 Nano |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input / 1M tokens | $0.10 | $0.05 |
| Output / 1M tokens | $0.40 | $0.40 |
| Context window | 1M | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Apr 2025 | Aug 2025 |
| Aider Polyglot score | 8.9 | — |
| LMArena (Chatbot Arena) Elo score | 1285 | 1320 |
| LMArena Vision Elo score | 1063 | 1159 |
| GPQA Diamond score | 48.9 | 69.4 |
| FrontierMath score | 1.0 | 8.3 |
| Epoch Capabilities Index score | 130 | 139 |
| LiveBench score | — | 48.8 |
| SWE-bench Verified score | — | 34.8 |
FAQ
Is GPT-4.1 Nano or GPT-5 Nano cheaper?
GPT-4.1 Nano and GPT-5 Nano have comparable output pricing.
Which has the larger context window, GPT-4.1 Nano or GPT-5 Nano?
GPT-4.1 Nano has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.