Microsoft: Phi 4 vs GPT-5.1
Microsoft: Phi 4 is cheaper on output tokens, while GPT-5.1 offers a larger context window. Choose Microsoft: Phi 4 or GPT-5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Microsoft: Phi 4 | GPT-5.1 |
|---|---|---|
| Provider | Microsoft | Poe |
| Input / 1M tokens | $0.07 | $1.10 |
| Output / 1M tokens | $0.14 | $9.00 |
| Context window | 16K | 400K |
| Parameters | — | — |
| Open weights | — | No |
| Released | — | Nov 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.