Phi 4 vs GPT-5.4 Pro
Phi 4 is cheaper on output tokens, while GPT-5.4 Pro offers a larger context window. Choose Phi 4 or GPT-5.4 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Phi 4 | GPT-5.4 Pro |
|---|---|---|
| Provider | Microsoft | OpenAI |
| Input / 1M tokens | $0.07 | $30.00 |
| Output / 1M tokens | $0.14 | $180.00 |
| Context window | 16K | 1.1M |
| Parameters | — | — |
| Open weights | — | No |
| Released | — | Mar 2026 |
| GPQA Diamond score | 56.1 | 94.6 |
| Epoch Capabilities Index score | 130 | 159 |
| LMArena (Chatbot Arena) Elo score | 1217 | — |
| FrontierMath score | — | 50.0 |
FAQ
Is Phi 4 or GPT-5.4 Pro cheaper?
Phi 4 is cheaper on output tokens ($0.14 vs $180.00 per 1M).
Which has the larger context window, Phi 4 or GPT-5.4 Pro?
GPT-5.4 Pro has the larger context window (1.1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.