Sonar Reasoning Pro vs GPT-5.5 Pro
Sonar Reasoning Pro is cheaper on output tokens, while GPT-5.5 Pro offers a larger context window. Choose Sonar Reasoning Pro or GPT-5.5 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Sonar Reasoning Pro | GPT-5.5 Pro |
|---|---|---|
| Provider | Opper | Opper |
| Input / 1M tokens | $2.00 | $30.00 |
| Output / 1M tokens | $8.00 | $180.00 |
| Context window | 128K | 1.1M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Jan 2024 | Apr 2026 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.