{
  "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": "claude-fable-5",
    "name": "Claude Fable 5",
    "vendor": "Anthropic",
    "family": "Claude",
    "category": "llm",
    "status": "generally-available",
    "groups": [
      "frontier",
      "agents",
      "reasoning"
    ],
    "short_answer": "Claude Fable 5 is an Anthropic language model released Jun 9, 2026; Anthropic's newest language model in our dataset is Claude Haiku 5.5. Proprietary, API access only. Anthropic's most capable model open to all customers when it launched on Jun 9, 2026, alongside the access-limited Claude Mythos 5; succeeded by Claude Fable 5.1. Verified against vendor sources on Oct 26, 2026.",
    "summary": "Anthropic's most capable model open to all customers when it launched on Jun 9, 2026, alongside the access-limited Claude Mythos 5; succeeded by Claude Fable 5.1.",
    "release_date": "2026-06-09",
    "latest_update": null,
    "api_id": "claude-fable-5",
    "context_tokens": 1000000,
    "max_output_tokens": 128000,
    "input_modalities": null,
    "output_modalities": null,
    "parameters": null,
    "license": "Proprietary (API)",
    "open_weights": false,
    "pricing": {
      "currency": "USD",
      "unit": "per 1M tokens",
      "input": 10,
      "output": 50,
      "text": "$10 in / $50 out per 1M tokens"
    },
    "evidence": "Reported",
    "tested_note": null,
    "last_verified": "2026-10-26",
    "is_stale": false,
    "facts": {
      "release_date": {
        "value": "2026-06-09",
        "source_url": "https://platform.claude.com/docs/en/release-notes/overview",
        "as_of": "2026-10-26",
        "evidence": "Reported",
        "note": "Date of the launch entry in the Claude Platform release notes (API availability)."
      },
      "api_id": {
        "value": "claude-fable-5",
        "source_url": "https://platform.claude.com/docs/en/release-notes/overview",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      },
      "context_tokens": {
        "value": 1000000,
        "source_url": "https://platform.claude.com/docs/en/release-notes/overview",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      },
      "max_output_tokens": {
        "value": 128000,
        "source_url": "https://platform.claude.com/docs/en/release-notes/overview",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      },
      "license": {
        "value": {
          "type": "proprietary",
          "name": "Proprietary (API)",
          "openWeights": false
        },
        "source_url": "https://platform.claude.com/docs/en/about-claude/models/overview",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      },
      "pricing": {
        "value": {
          "currency": "USD",
          "unit": "per 1M tokens",
          "input": 10,
          "output": 50
        },
        "source_url": "https://platform.claude.com/docs/en/release-notes/overview",
        "as_of": "2026-10-26",
        "evidence": "Reported"
      }
    },
    "vendor_claims": [],
    "notes": [],
    "not_verified": [
      "Input and output modalities were not captured from the release notes for this model.",
      "The price is stated in the release notes of its successor (Fable 5.1, \"$10 / $50 ... the same as Claude Fable 5\")."
    ],
    "sources": [
      {
        "label": "Claude Platform release notes",
        "url": "https://platform.claude.com/docs/en/release-notes/overview"
      },
      {
        "label": "Anthropic models overview",
        "url": "https://platform.claude.com/docs/en/about-claude/models/overview"
      }
    ],
    "url": "https://theagenticweekly.com/models/claude-fable-5",
    "markdown": "https://theagenticweekly.com/models/claude-fable-5.md",
    "api": "https://theagenticweekly.com/api/models/claude-fable-5"
  }
}