{
  "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": "kimi-k3-1-pro",
    "name": "Kimi K3.1 Pro",
    "vendor": "Moonshot AI",
    "family": "Kimi",
    "category": "llm",
    "status": "generally-available",
    "groups": [
      "agents",
      "coding",
      "reasoning"
    ],
    "short_answer": "Kimi K3.1 Pro is Moonshot AI's latest language model in our dataset, released Oct 23, 2026. Open weights are promised but not yet published. Moonshot's post-trained successor to Kimi K3, a 3T-class model with a 1M-token context, live in Kimi apps and the API on Oct 23, 2026; open weights are promised by Nov 4. Verified against vendor sources on Oct 26, 2026.",
    "summary": "Moonshot's post-trained successor to Kimi K3, a 3T-class model with a 1M-token context, live in Kimi apps and the API on Oct 23, 2026; open weights are promised by Nov 4.",
    "release_date": "2026-10-23",
    "latest_update": null,
    "api_id": "kimi-k3.1-pro",
    "context_tokens": 1048576,
    "max_output_tokens": null,
    "input_modalities": null,
    "output_modalities": null,
    "parameters": {
      "total": "2.8T",
      "active": "104B",
      "architecture": "mixture-of-experts"
    },
    "license": "Not yet published",
    "open_weights": false,
    "pricing": {
      "currency": "USD",
      "unit": "per 1M tokens",
      "input": 2,
      "output": 10,
      "cachedInput": 0.2,
      "text": "$2 in / $10 out per 1M tokens"
    },
    "evidence": "Reported",
    "tested_note": null,
    "last_verified": "2026-10-26",
    "is_stale": false,
    "facts": {
      "release_date": {
        "value": "2026-10-23",
        "source_url": "https://vercel.com/changelog/kimi-k3-1-pro-and-kimi-k3-1-pro-highspeed-are-available-now-in-ai-gateway",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "Vercel's AI Gateway changelog, dated Oct 23, 2026, lists K3.1 Pro as available that day; Artificial Analysis also dated its launch write-up Oct 23. Moonshot's blog carries no date; Reuters reported the launch on Oct 24 Beijing time."
      },
      "api_id": {
        "value": "kimi-k3.1-pro",
        "source_url": "https://www.kimi.ai/blog/kimi-k3-1-pro",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "A faster sibling, kimi-k3.1-pro-highspeed, launched alongside it."
      },
      "context_tokens": {
        "value": 1048576,
        "source_url": "https://www.kimi.ai/resources/kimi-k3-1-pro-pricing",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "Moonshot states 1M tokens; the pricing page gives 1,048,576."
      },
      "parameters": {
        "value": {
          "total": "2.8T",
          "active": "104B",
          "architecture": "mixture-of-experts"
        },
        "source_url": "https://artificialanalysis.ai/articles/kimi-k3-1-pro-launch-benchmarks",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "Figures are from Artificial Analysis; Moonshot itself only says \"3T-class\"."
      },
      "license": {
        "value": {
          "type": "unpublished",
          "name": "Not yet published",
          "openWeights": false
        },
        "source_url": "https://www.kimi.ai/blog/kimi-k3-1-pro",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "Moonshot calls it an open-weight model and says the full weights will be released by Nov 4, 2026. Until the weights and license are published we do not label it open-weights."
      },
      "pricing": {
        "value": {
          "currency": "USD",
          "unit": "per 1M tokens",
          "input": 2,
          "output": 10,
          "cachedInput": 0.2
        },
        "source_url": "https://www.kimi.ai/resources/kimi-k3-1-pro-pricing",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "Highspeed variant: $4.00 input, $20.00 output, $0.20 cached input. Rates checked by Moonshot on Oct 24, 2026."
      }
    },
    "vendor_claims": [
      "Moonshot reports 65.7% on Terminal-Bench 4.0 (Claude Code harness), against 66.4% for Claude Opus 5.5 and 58.2% for GPT-6 Astra. This is a vendor-run figure."
    ],
    "notes": [
      "Artificial Analysis scored it 55 on its Intelligence Index at launch (4th, behind Claude Opus 5.5 at 58, Claude Sonnet 5.5 at 56 and Muse Wonder Full at 56) and 67% on Terminal-Bench 4.0 in its own run, which differs from Moonshot's 65.7%.",
      "The faster tier, Kimi K3.1 Pro Highspeed, has its own page: /models/kimi-k3-1-pro-highspeed."
    ],
    "not_verified": [
      "Input and output modalities were not confirmed on Moonshot's own pages.",
      "Weights and license are not published yet; Moonshot says they arrive by Nov 4, 2026."
    ],
    "sources": [
      {
        "label": "Kimi K3.1 Pro blog",
        "url": "https://www.kimi.ai/blog/kimi-k3-1-pro"
      },
      {
        "label": "Vercel AI Gateway changelog",
        "url": "https://vercel.com/changelog/kimi-k3-1-pro-and-kimi-k3-1-pro-highspeed-are-available-now-in-ai-gateway"
      },
      {
        "label": "Kimi K3.1 Pro pricing page",
        "url": "https://www.kimi.ai/resources/kimi-k3-1-pro-pricing"
      },
      {
        "label": "Artificial Analysis launch benchmarks",
        "url": "https://artificialanalysis.ai/articles/kimi-k3-1-pro-launch-benchmarks"
      }
    ],
    "url": "https://theagenticweekly.com/models/kimi-k3-1-pro",
    "markdown": "https://theagenticweekly.com/models/kimi-k3-1-pro.md",
    "api": "https://theagenticweekly.com/api/models/kimi-k3-1-pro"
  }
}