GPT-5.5 Pro
unknownOpenAI · gpt-pro family
Highest-accuracy GPT-5.5 tier for slower, precision-heavy reasoning and coding
Limits
Context1,050,000
Input922,000
Output128,000
Modalities
Inputtext, image, pdf
Outputtext
Release info
Release2026-04-23
Last update2026-04-23
Knowledge cutoff2025-12-01
Provider offerings
Provider-specific prices and limits stay separate from canonical model facts.
| Provider | Provider model ID | Input | Output | Context | Output limit |
|---|---|---|---|---|---|
| LLM Gateway | gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,050,000 | 128,000 |
| OpenCode Zen | gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,050,000 | 128,000 |
| OpenAI | gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,050,000 | 128,000 |
| OpenRouter | openai/gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,050,000 | 128,000 |
| CrossModel | openai/gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,050,000 | 128,000 |
| Kilo Gateway | openai/gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,050,000 | 128,000 |
| FastRouter | openai/gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,050,000 | 128,000 |
| ZenMux | openai/gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,050,000 | 128,000 |
| Poe | openai/gpt-5.5-pro | $27.2727 / 1M | $163.6364 / 1M | 400,000 | 128,000 |
| Vercel AI Gateway | openai/gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,000,000 | 128,000 |
| OrcaRouter | openai/gpt-5.5-pro | $30 / 1M | $180 / 1M | 1,050,000 | 128,000 |
Capabilities
Attachments
Yes
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Temperature
No