GPT-5.5 Pro

{
  "id": "gpt-5.5-pro",
  "object": "model",
  "created": 1776988800,
  "owned_by": "openai",
  "name": "GPT-5.5 Pro",
  "api": {
    "types": [
      "responses",
      "batch"
    ]
  },
  "limits": {
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    "input": null,
    "output": 128000
  },
  "modalities": {
    "input": [
      "text",
      "image"
    ],
    "output": [
      "text"
    ]
  },
  "reasoning": {
    "supported": true,
    "efforts": [
      "medium",
      "high",
      "xhigh"
    ]
  },
  "pricing": {
    "currency": "USD",
    "unit": "1M_tokens",
    "input": 30,
    "output": 180,
    "cache_read": null,
    "cache_write": null
  },
  "features": [
    "tools",
    "structured_output",
    "batch"
  ],
  "info": {
    "status": "active",
    "release_date": "2026-04-24",
    "knowledge_cutoff": "2025-12-01",
    "description": "Version of GPT-5.5 that produces smarter and more precise responses.",
    "docs": "https://developers.openai.com/api/docs/models/gpt-5.5-pro",
    "verified_at": "2026-10-10"
  }
}