{
  "site": "Agentic Weekly",
  "dataset": "Agentic Weekly model facts",
  "as_of": "2026-10-26",
  "license": {
    "name": "CC BY 4.0",
    "url": "https://creativecommons.org/licenses/by/4.0/"
  },
  "attribution": "Data: Agentic Weekly (https://theagenticweekly.com), CC BY 4.0",
  "page": "https://theagenticweekly.com/models",
  "evidence_labels": {
    "Reported": "Read from the cited vendor page on the as-of date; not run by us.",
    "Tested": "We ran it ourselves; scope is stated in tested_note. No model is Tested yet."
  },
  "model": {
    "slug": "gpt-6-1-terra",
    "name": "GPT-6.1 Terra",
    "vendor": "OpenAI",
    "family": "GPT-6",
    "category": "llm",
    "status": "generally-available",
    "groups": [
      "agents",
      "small-fast"
    ],
    "short_answer": "GPT-6.1 Terra is OpenAI's latest language model in our dataset, released Oct 26, 2026. Proprietary, API access only. OpenAI's fast, lower-cost GPT-6.1 model for visual reasoning, computer use and writing; the successor to GPT-5.6 Terra, priced at half of GPT-6.1 Sol. Verified against vendor sources on Oct 26, 2026.",
    "summary": "OpenAI's fast, lower-cost GPT-6.1 model for visual reasoning, computer use and writing; the successor to GPT-5.6 Terra, priced at half of GPT-6.1 Sol.",
    "release_date": "2026-10-26",
    "latest_update": null,
    "api_id": "gpt-6.1-terra",
    "context_tokens": 1050000,
    "max_output_tokens": 128000,
    "input_modalities": [
      "text",
      "image"
    ],
    "output_modalities": [
      "text"
    ],
    "parameters": null,
    "license": "Proprietary (API)",
    "open_weights": false,
    "pricing": {
      "currency": "USD",
      "unit": "per 1M tokens",
      "input": 1,
      "output": 5,
      "cachedInput": 0.05,
      "tiers": [
        {
          "label": "Prompts above 272K input tokens (2x input and cache rates, 1.5x output, for the full request)",
          "input": 2,
          "output": 7.5,
          "cachedInput": 0.1
        }
      ],
      "text": "$1 in / $5 out per 1M tokens"
    },
    "evidence": "Reported",
    "tested_note": null,
    "last_verified": "2026-10-26",
    "is_stale": false,
    "facts": {
      "release_date": {
        "value": "2026-10-26",
        "source_url": "https://developers.openai.com/api/docs/changelog",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "OpenAI API changelog. The announcement page shows only the year."
      },
      "api_id": {
        "value": "gpt-6.1-terra",
        "source_url": "https://developers.openai.com/api/docs/models/gpt-6.1-terra",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      },
      "context_tokens": {
        "value": 1050000,
        "source_url": "https://developers.openai.com/api/docs/models/gpt-6.1-terra",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "Maximum input is 922,000 tokens."
      },
      "max_output_tokens": {
        "value": 128000,
        "source_url": "https://developers.openai.com/api/docs/models/gpt-6.1-terra",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      },
      "input_modalities": {
        "value": [
          "text",
          "image"
        ],
        "source_url": "https://developers.openai.com/api/docs/models/gpt-6.1-terra",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      },
      "output_modalities": {
        "value": [
          "text"
        ],
        "source_url": "https://developers.openai.com/api/docs/models/gpt-6.1-terra",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      },
      "license": {
        "value": {
          "type": "proprietary",
          "name": "Proprietary (API)",
          "openWeights": false
        },
        "source_url": "https://developers.openai.com/api/docs/models/gpt-6.1-terra",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      },
      "pricing": {
        "value": {
          "currency": "USD",
          "unit": "per 1M tokens",
          "input": 1,
          "output": 5,
          "cachedInput": 0.05,
          "tiers": [
            {
              "label": "Prompts above 272K input tokens (2x input and cache rates, 1.5x output, for the full request)",
              "input": 2,
              "output": 7.5,
              "cachedInput": 0.1
            }
          ]
        },
        "source_url": "https://developers.openai.com/api/docs/models/gpt-6.1-terra",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "Standard processing. Fast mode is 2x; Batch and Flex are 50% lower."
      }
    },
    "vendor_claims": [
      "Vendor claim (OpenAI): on Agents' Last Exam at medium effort, 15 percentage points above GPT-5.6 Terra at about one-third of the cost. We have not independently measured this.",
      "At launch it was available to Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and in the API."
    ],
    "notes": [
      "Knowledge cutoff listed: Jun 01, 2026.",
      "Reasoning effort supports none, low, medium (default), high, xhigh and max. GPT-6.1 Sol and GPT-6 Astra do not support none.",
      "Tool calling requires the Responses API. Fine-tuning is not supported. Audio and video input are not supported.",
      "Listed as meeting the Critical threshold in cybersecurity under OpenAI's Preparedness Framework."
    ],
    "not_verified": [
      "Benchmark scores: OpenAI's launch post shows Agents' Last Exam, OSWorld 2.1 and MMMU-Pro results as charts whose values are not in the page text, so none are copied here. The text gives Terminal-Bench 4.0 at 50.3% (max effort), which is OpenAI's own figure.",
      "Speed: OpenAI says Terra completes tasks over three times faster than GPT-6 Astra and GPT-6.1 Sol; we found no independent latency measurement, so no speed figure is listed."
    ],
    "sources": [
      {
        "label": "OpenAI model page",
        "url": "https://developers.openai.com/api/docs/models/gpt-6.1-terra"
      },
      {
        "label": "OpenAI API pricing",
        "url": "https://developers.openai.com/api/docs/pricing"
      },
      {
        "label": "OpenAI API changelog",
        "url": "https://developers.openai.com/api/docs/changelog"
      },
      {
        "label": "OpenAI GPT-6 guide",
        "url": "https://developers.openai.com/api/docs/guides/latest-model"
      },
      {
        "label": "Agentic Weekly brief on the launch",
        "url": "https://theagenticweekly.com/news/openai-gpt-6-1-terra-computer-use"
      }
    ],
    "url": "https://theagenticweekly.com/models/gpt-6-1-terra",
    "markdown": "https://theagenticweekly.com/models/gpt-6-1-terra.md",
    "api": "https://theagenticweekly.com/api/models/gpt-6-1-terra"
  }
}