Model information
Released
2026-04-23
Context window
1.1M
Max output
128K
Weights
Closed
Modalities
Input
ImageText
Output
Text
Identity
- Version
- gpt-5.5-pro
- Knowledge cutoff
- 2025-12-01
- Aliases
- GPT-5.5 Pro
Capabilities
AttachmentsReasoningStructuredTool call
Official price
input $30/M · output $180/M
Providers
| Provider | Provider model ID | Protocol | Context | Max output | Input | Output | Capabilities | Notes | Pricing | Streaming |
|---|---|---|---|---|---|---|---|---|---|---|
| CrossModel | openai/gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | - | input $30/M · output $180/M | Yes | ||
| Poe | openai/gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool call | - | input $27.273/M · output $163.636/M | Yes | ||
| FastRouter | openai/gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | - | input $30/M · output $180/M | Yes | ||
| LLM Gateway | gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | - | input $30/M · output $180/M | Yes | ||
| OpenCode Zen | gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool call | - | input $30/M · output $180/M cache read $30/M | Yes | ||
| ZenMux | openai/gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | - | input $30/M · output $180/M | Yes | ||
| OrcaRouter | openai/gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | - | input $30/M · output $180/M | Yes | ||
| Kilo Gateway | openai/gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | - | input $30/M · output $180/M | Yes | ||
| Vercel AI Gateway | openai/gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructuredTemperature | - | input $30/M · output $180/M | Yes | ||
| OpenRouter | openai/gpt-5.5-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | Moderated, Reasoning levels: xhigh, high, medium, Default reasoning: medium, Reasoning required | input $30/M · output $180/M | Yes | ||
| OpenAI | gpt-5.5-pro | openai_responses | 1.1M | 128K | AttachmentsReasoningTool callStructured | - | input $30/M · output $180/M | Yes |