GPT-5.6 Luna

{
  "id": "openai/gpt-5.6-luna",
  "name": "GPT-5.6 Luna",
  "description": "Cost-efficient GPT-5.6 model for fast, high-volume workloads",
  "family": "gpt-luna",
  "last_updated": "2026-07-09",
  "knowledge": "2026-02-16",
  "attachment": true,
  "reasoning": true,
  "tool_call": true,
  "structured_output": true,
  "temperature": false,
  "modalities": {
    "input": [
      "text",
      "image",
      "pdf"
    ],
    "output": [
      "text"
    ]
  },
  "limit": {
    "context": 1050000,
    "input": 922000,
    "output": 128000
  },
  "benchmarks": [
    {
      "name": "SWE-Bench Pro",
      "score": 62.7,
      "source": "https://openai.com/index/gpt-5-6/",
      "metric": "resolve rate",
      "date": "2026-07-09"
    },
    {
      "name": "Terminal-Bench",
      "score": 84.7,
      "source": "https://openai.com/index/gpt-5-6/",
      "metric": "success rate",
      "version": "2.1",
      "date": "2026-07-09"
    },
    {
      "name": "DeepSWE",
      "score": 67.2,
      "source": "https://openai.com/index/gpt-5-6/",
      "metric": "resolve rate",
      "version": "1.1",
      "date": "2026-07-09"
    },
    {
      "name": "GPQA Diamond",
      "score": 92.3,
      "source": "https://openai.com/index/gpt-5-6/",
      "metric": "accuracy",
      "date": "2026-07-09"
    },
    {
      "name": "FrontierMath",
      "score": 78.6,
      "source": "https://openai.com/index/gpt-5-6/",
      "metric": "accuracy",
      "dataset": "Tier 1-3",
      "version": "v2",
      "date": "2026-07-09"
    },
    {
      "name": "BrowseComp",
      "score": 83.3,
      "source": "https://openai.com/index/gpt-5-6/",
      "metric": "accuracy",
      "date": "2026-07-09"
    },
    {
      "name": "OSWorld",
      "score": 45.6,
      "source": "https://openai.com/index/gpt-5-6/",
      "metric": "success rate",
      "version": "2.0",
      "date": "2026-07-09"
    },
    {
      "name": "MMMU Pro",
      "score": 78.4,
      "source": "https://openai.com/index/gpt-5-6/",
      "metric": "accuracy",
      "variant": "no tools",
      "date": "2026-07-09"
    },
    {
      "name": "Agents' Last Exam",
      "score": 50.3,
      "source": "https://openai.com/index/gpt-5-6/",
      "date": "2026-07-09"
    },
    {
      "name": "Toolathlon",
      "score": 53.4,
      "source": "https://openai.com/index/gpt-5-6/",
      "metric": "success rate",
      "date": "2026-07-09"
    },
    {
      "name": "Artificial Analysis Intelligence Index",
      "score": 51.2,
      "source": "https://artificialanalysis.ai/articles/gpt-5-6-has-landed",
      "metric": "index score",
      "variant": "max",
      "version": "4.1",
      "date": "2026-07-09"
    },
    {
      "name": "Artificial Analysis Coding Agent Index",
      "score": 74.6,
      "source": "https://artificialanalysis.ai/articles/gpt-5-6-has-landed",
      "metric": "index score",
      "harness": "Codex",
      "variant": "max",
      "version": "1.1",
      "date": "2026-07-09"
    }
  ],
  "release_date": "2026-07-09",
  "open_weights": false
}