GPT-5.4 Pro vs GPT-5.5 Pro
Both have similar output pricing. Choose GPT-5.4 Pro or GPT-5.5 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.4 Pro | GPT-5.5 Pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input / 1M tokens | $30.00 | $30.00 |
| Output / 1M tokens | $180.00 | $180.00 |
| Context window | 1.1M | 1.1M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Mar 2026 | Apr 2026 |
| Epoch Capabilities Index score | 159 | 162 |
| GPQA Diamond score | 94.6 | — |
| FrontierMath score | 50.0 | — |
FAQ
Is GPT-5.4 Pro or GPT-5.5 Pro cheaper?
GPT-5.4 Pro and GPT-5.5 Pro have comparable output pricing.
Which has the larger context window, GPT-5.4 Pro or GPT-5.5 Pro?
Both models offer a similar context window.
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.