# GPT-5.5 Pro

> GPT-5.5 Pro uses OpenAI's Responses API with built-in tools, improved reasoning, and stateful context management. Based on GPT-5.5 with enhanced tool integration for agentic workflows.


**ID**: `openai/gpt-5.5-pro`  
**Creator**: OpenAI  
**Category**: multimodal  
**Context**: 922K tokens  
**Pricing**: $2.50 / $15.00 per 1M · billed by your provider (BYOK)  
**Released**: 2026-06-01  
**Web page**: https://anyrouter.dev/model/openai/gpt-5.5-pro

**Input modalities**: text, image  
**Output modalities**: text  

**Tokenizer**: GPT

**Capabilities**: chat, coding, reasoning, multimodal, vision, streaming, function-calling

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/chat/completions`

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openai/gpt-5.5-pro",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| openai-byok | $2.50/M (list) | $15.00/M (list) |
| opencode-zen-byok | $2.50/M (list) | $15.00/M (list) |
| router-byok | $30.00/M (list) | $180.00/M (list) |
| vercel-byok | $30.00/M (list) | $180.00/M (list) |

BYOK routes are billed by your own provider key — AnyRouter charges $0. Rates marked (list) are the provider's published list price.

## Source

- Upstream docs: https://platform.openai.com/docs/models/gpt-5.5-pro