Compare
 GPT-5.5 ProOpenAI | |
|---|---|
| Best input | $15.00 /MTok |
| Best output | $90.00 /MTok |
| Cache read | $3.00 |
| Context | 1.05M |
| Max output | 128K |
| Modalities in | file, image, text |
| Tool calling | ✓ |
| Structured output | ✓ |
| Reasoning | ✓ |
| Vision | ✓ |
| Audio input | — |
| Prompt caching | — |
| Providers | 2 |
| Cheapest provider | OpenAI |
| License | Proprietary |
| Released | Apr 24, 2026 |