GPT-5.5 Pro
OpenAI first-party · 1,050,000 ctx · from $30 input / $180 output per 1M tokens
- Input price ranks #444 of 447 priced models (cheaper = better).
- Cheaper alternative with ≥ same context: OpenAI GPT Latest at $5 input.
| Provider | OpenAI |
|---|---|
| Family | gpt-pro |
| Context window | 1,050,000 |
| Max output | 128,000 |
| Input price | $30 |
| Output price | $180 |
| Cache read | — |
| Cache write | — |
| Reasoning | Yes |
| Tool calling | Yes |
| Vision | Yes |
| Open weights | No |
| Knowledge cutoff | 2025-12-01 |
| Released | 2026-04-23 |
| Last updated | 2026-04-23 |
Available from 2 curated sources
| Source | Input | Output |
|---|---|---|
| OpenAI first-party | $30 | $180 |
| OpenRouter | $30 | $180 |
Identity: OpenAI; data via models.dev + OpenRouter public APIs. Always confirm on the provider's official pricing page.