{
  "title": "Claude Model Timeline",
  "description": "Every publicly released Claude model from Anthropic: release date, API model ID, family, published context window, lifecycle status, and a first-party source for each row.",
  "homepage": "https://nightschoolai.com/claude-model-timeline",
  "download_url": "https://nightschoolai.com/api/claude-models",
  "publisher": "Nightschool AI",
  "license": "CC-BY-4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "Claude Model Timeline by Nightschool AI (https://nightschoolai.com/claude-model-timeline), CC BY 4.0",
  "disclaimer": "Independent reference compiled by Nightschool AI from Anthropic's public announcements and documentation. Not affiliated with or endorsed by Anthropic. Claude is a trademark of Anthropic.",
  "last_updated": "2026-10-13",
  "status_definitions": {
    "current": "Listed in the comparison table on Anthropic's models overview page (or the verification-gated twin of a model listed there).",
    "legacy": "Still available on the Claude API but no longer in the current lineup. Anthropic lists it as active with no deprecation date yet.",
    "deprecated": "Still works, but Anthropic has announced a retirement date and a recommended replacement.",
    "retired": "No longer available on the Claude API. Requests to it fail."
  },
  "field_notes": {
    "release_date": "Date the model became available, as stated on the linked Anthropic page (YYYY-MM-DD).",
    "api_model_ids": "Claude API model IDs. The first entry is the main ID; extra entries are additional snapshots or versions in the same row.",
    "context_window": "Context window as Anthropic published it. null means we could not confirm it on a first-party page we fetched.",
    "status": "Lifecycle status on Anthropic-operated platforms (Claude API). Amazon Bedrock and Google Cloud set their own schedules.",
    "retirement_date": "Actual or scheduled retirement date for deprecated and retired models. For active models see retirement_note."
  },
  "models": [
    {
      "name": "Claude 1",
      "also_known_as": [],
      "family": "Claude 1",
      "api_model_ids": [
        "claude-1.0",
        "claude-1.1",
        "claude-1.2",
        "claude-1.3"
      ],
      "api_alias": null,
      "release_date": "2023-03-14",
      "context_window": "9K tokens at launch, expanded to 100K tokens on May 11, 2023",
      "context_window_tokens": 100000,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2024-09-04",
      "retirement_date": "2024-11-06",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/introducing-claude",
      "additional_sources": [
        "https://www.anthropic.com/news/100k-context-windows",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Anthropic did not announce the 1.x point versions individually; the deprecations page lists all four IDs."
    },
    {
      "name": "Claude Instant 1",
      "also_known_as": [],
      "family": "Claude Instant",
      "api_model_ids": [
        "claude-instant-1.0",
        "claude-instant-1.1"
      ],
      "api_alias": null,
      "release_date": "2023-03-14",
      "context_window": null,
      "context_window_tokens": null,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2024-09-04",
      "retirement_date": "2024-11-06",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/introducing-claude",
      "additional_sources": [
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Launched alongside Claude 1 as the lighter, faster option."
    },
    {
      "name": "Claude 2",
      "also_known_as": [],
      "family": "Claude 2",
      "api_model_ids": [
        "claude-2.0"
      ],
      "api_alias": null,
      "release_date": "2023-07-11",
      "context_window": "100K tokens",
      "context_window_tokens": 100000,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2025-01-21",
      "retirement_date": "2025-07-21",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-2",
      "additional_sources": [
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Instant 1.2",
      "also_known_as": [],
      "family": "Claude Instant",
      "api_model_ids": [
        "claude-instant-1.2"
      ],
      "api_alias": null,
      "release_date": "2023-08-09",
      "context_window": null,
      "context_window_tokens": null,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2024-09-04",
      "retirement_date": "2024-11-06",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/releasing-claude-instant-1-2",
      "additional_sources": [
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude 2.1",
      "also_known_as": [],
      "family": "Claude 2",
      "api_model_ids": [
        "claude-2.1"
      ],
      "api_alias": null,
      "release_date": "2023-11-21",
      "context_window": "200K tokens",
      "context_window_tokens": 200000,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2025-01-21",
      "retirement_date": "2025-07-21",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-2-1",
      "additional_sources": [
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude 3 Opus",
      "also_known_as": [
        "Claude Opus 3"
      ],
      "family": "Opus",
      "api_model_ids": [
        "claude-3-opus-20240229"
      ],
      "api_alias": null,
      "release_date": "2024-03-04",
      "context_window": "200K tokens",
      "context_window_tokens": 200000,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2025-06-30",
      "retirement_date": "2026-01-05",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-3-family",
      "additional_sources": [
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude 3 Sonnet",
      "also_known_as": [
        "Claude Sonnet 3"
      ],
      "family": "Sonnet",
      "api_model_ids": [
        "claude-3-sonnet-20240229"
      ],
      "api_alias": null,
      "release_date": "2024-03-04",
      "context_window": "200K tokens",
      "context_window_tokens": 200000,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2025-01-21",
      "retirement_date": "2025-07-21",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-3-family",
      "additional_sources": [
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude 3 Haiku",
      "also_known_as": [
        "Claude Haiku 3"
      ],
      "family": "Haiku",
      "api_model_ids": [
        "claude-3-haiku-20240307"
      ],
      "api_alias": null,
      "release_date": "2024-03-13",
      "context_window": "200K tokens",
      "context_window_tokens": 200000,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2026-02-19",
      "retirement_date": "2026-04-20",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-3-haiku",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-3-family",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Announced with the Claude 3 family on March 4, 2024; available from March 13, 2024. The 200K context window is from the Claude 3 family announcement."
    },
    {
      "name": "Claude 3.5 Sonnet",
      "also_known_as": [
        "Claude Sonnet 3.5"
      ],
      "family": "Sonnet",
      "api_model_ids": [
        "claude-3-5-sonnet-20240620"
      ],
      "api_alias": null,
      "release_date": "2024-06-20",
      "context_window": "200K tokens",
      "context_window_tokens": 200000,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2025-08-13",
      "retirement_date": "2025-10-28",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-3-5-sonnet",
      "additional_sources": [
        "https://platform.claude.com/docs/en/release-notes/overview",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Release date from Anthropic's API release notes (June 20, 2024). The announcement page shows June 21, 2024 because it was published late on June 20, US time."
    },
    {
      "name": "Claude 3.5 Sonnet (upgraded)",
      "also_known_as": [
        "Claude Sonnet 3.5 (October 2024)"
      ],
      "family": "Sonnet",
      "api_model_ids": [
        "claude-3-5-sonnet-20241022"
      ],
      "api_alias": null,
      "release_date": "2024-10-22",
      "context_window": null,
      "context_window_tokens": null,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2025-08-13",
      "retirement_date": "2025-10-28",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/3-5-models-and-computer-use",
      "additional_sources": [
        "https://platform.claude.com/docs/en/release-notes/overview",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Upgraded version of Claude 3.5 Sonnet, announced with computer use (beta)."
    },
    {
      "name": "Claude 3.5 Haiku",
      "also_known_as": [
        "Claude Haiku 3.5"
      ],
      "family": "Haiku",
      "api_model_ids": [
        "claude-3-5-haiku-20241022"
      ],
      "api_alias": null,
      "release_date": "2024-11-04",
      "context_window": null,
      "context_window_tokens": null,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2025-12-19",
      "retirement_date": "2026-02-19",
      "retirement_note": null,
      "source_url": "https://platform.claude.com/docs/en/release-notes/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/3-5-models-and-computer-use",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Announced October 22, 2024; available on the Claude API as a text-only model from November 4, 2024 (API release notes)."
    },
    {
      "name": "Claude 3.7 Sonnet",
      "also_known_as": [
        "Claude Sonnet 3.7"
      ],
      "family": "Sonnet",
      "api_model_ids": [
        "claude-3-7-sonnet-20250219"
      ],
      "api_alias": null,
      "release_date": "2025-02-24",
      "context_window": null,
      "context_window_tokens": null,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2025-10-28",
      "retirement_date": "2026-02-19",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-3-7-sonnet",
      "additional_sources": [
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Launched alongside Claude Code. Anthropic described it as the first hybrid reasoning model on the market."
    },
    {
      "name": "Claude Opus 4",
      "also_known_as": [],
      "family": "Opus",
      "api_model_ids": [
        "claude-opus-4-20250514"
      ],
      "api_alias": null,
      "release_date": "2025-05-22",
      "context_window": null,
      "context_window_tokens": null,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2026-04-14",
      "retirement_date": "2026-06-15",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-4",
      "additional_sources": [
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Sonnet 4",
      "also_known_as": [],
      "family": "Sonnet",
      "api_model_ids": [
        "claude-sonnet-4-20250514"
      ],
      "api_alias": null,
      "release_date": "2025-05-22",
      "context_window": "200K tokens (a 1M-token beta was offered from August 12, 2025 until April 30, 2026)",
      "context_window_tokens": 200000,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2026-04-14",
      "retirement_date": "2026-06-15",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-4",
      "additional_sources": [
        "https://platform.claude.com/docs/en/release-notes/overview",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Opus 4.1",
      "also_known_as": [],
      "family": "Opus",
      "api_model_ids": [
        "claude-opus-4-1-20250805"
      ],
      "api_alias": null,
      "release_date": "2025-08-05",
      "context_window": null,
      "context_window_tokens": null,
      "max_output": null,
      "status": "retired",
      "access": "general",
      "deprecated_date": "2026-06-05",
      "retirement_date": "2026-08-05",
      "retirement_note": null,
      "source_url": "https://www.anthropic.com/news/claude-opus-4-1",
      "additional_sources": [
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Sonnet 4.5",
      "also_known_as": [],
      "family": "Sonnet",
      "api_model_ids": [
        "claude-sonnet-4-5-20250929"
      ],
      "api_alias": "claude-sonnet-4-5",
      "release_date": "2025-09-29",
      "context_window": "200K tokens",
      "context_window_tokens": 200000,
      "max_output": "64K tokens",
      "status": "deprecated",
      "access": "general",
      "deprecated_date": "2026-09-30",
      "retirement_date": "2026-11-30",
      "retirement_note": null,
      "source_url": "https://platform.claude.com/docs/en/models/sonnet-4-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-sonnet-4-5",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Anthropic's recommended replacement is Claude Sonnet 5.5."
    },
    {
      "name": "Claude Haiku 4.5",
      "also_known_as": [],
      "family": "Haiku",
      "api_model_ids": [
        "claude-haiku-4-5-20251001"
      ],
      "api_alias": "claude-haiku-4-5",
      "release_date": "2025-10-15",
      "context_window": "200K tokens",
      "context_window_tokens": 200000,
      "max_output": "64K tokens",
      "status": "legacy",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than October 15, 2026",
      "source_url": "https://platform.claude.com/docs/en/models/haiku-4-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-haiku-4-5",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Opus 4.5",
      "also_known_as": [],
      "family": "Opus",
      "api_model_ids": [
        "claude-opus-4-5-20251101"
      ],
      "api_alias": "claude-opus-4-5",
      "release_date": "2025-11-24",
      "context_window": "200K tokens",
      "context_window_tokens": 200000,
      "max_output": "64K tokens",
      "status": "legacy",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than November 24, 2026",
      "source_url": "https://platform.claude.com/docs/en/models/opus-4-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-opus-4-5",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Opus 4.6",
      "also_known_as": [],
      "family": "Opus",
      "api_model_ids": [
        "claude-opus-4-6"
      ],
      "api_alias": null,
      "release_date": "2026-02-05",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "legacy",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than February 5, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/opus-4-6/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-opus-4-6",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "First model of the 4.6 generation, from which Anthropic uses dateless pinned API IDs. The 1M context window launched in beta and later became the default."
    },
    {
      "name": "Claude Sonnet 4.6",
      "also_known_as": [],
      "family": "Sonnet",
      "api_model_ids": [
        "claude-sonnet-4-6"
      ],
      "api_alias": null,
      "release_date": "2026-02-17",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "legacy",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than February 17, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/sonnet-4-6/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-sonnet-4-6",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Opus 4.7",
      "also_known_as": [],
      "family": "Opus",
      "api_model_ids": [
        "claude-opus-4-7"
      ],
      "api_alias": null,
      "release_date": "2026-04-16",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "legacy",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than April 16, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/opus-4-7/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-opus-4-7",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Introduced the tokenizer used by current Claude models."
    },
    {
      "name": "Claude Opus 4.8",
      "also_known_as": [],
      "family": "Opus",
      "api_model_ids": [
        "claude-opus-4-8"
      ],
      "api_alias": null,
      "release_date": "2026-05-28",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "legacy",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than May 28, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/opus-4-8/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-opus-4-8",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Fable 5",
      "also_known_as": [],
      "family": "Fable",
      "api_model_ids": [
        "claude-fable-5"
      ],
      "api_alias": null,
      "release_date": "2026-06-09",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "legacy",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than June 9, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/fable-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-fable-5-mythos-5",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Anthropic describes Fable 5 as a Mythos-class model made safe for general use. Access was suspended on June 12, 2026 and restored on July 1, 2026."
    },
    {
      "name": "Claude Mythos 5",
      "also_known_as": [],
      "family": "Mythos",
      "api_model_ids": [
        "claude-mythos-5"
      ],
      "api_alias": null,
      "release_date": "2026-06-09",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "legacy",
      "access": "verification required",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than June 9, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/mythos-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-fable-5-mythos-5",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Same underlying model as Fable 5 with some safeguards lifted, offered only to verified organizations (initially through Project Glasswing). Anthropic's docs list its state as Active (verification required); we mark it legacy because Claude Mythos 5.1 succeeded it."
    },
    {
      "name": "Claude Sonnet 5",
      "also_known_as": [],
      "family": "Sonnet",
      "api_model_ids": [
        "claude-sonnet-5"
      ],
      "api_alias": null,
      "release_date": "2026-06-30",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "legacy",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than June 30, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/sonnet-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-sonnet-5",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Opus 5",
      "also_known_as": [],
      "family": "Opus",
      "api_model_ids": [
        "claude-opus-5"
      ],
      "api_alias": null,
      "release_date": "2026-07-24",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "legacy",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than July 24, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/opus-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/news/claude-opus-5",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Fable 5.1",
      "also_known_as": [],
      "family": "Fable",
      "api_model_ids": [
        "claude-fable-5-1"
      ],
      "api_alias": null,
      "release_date": "2026-09-01",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "current",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than September 1, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/fable-5-1/overview",
      "additional_sources": [
        "https://www.anthropic.com/claude-fable-and-mythos-5-1",
        "https://platform.claude.com/docs/en/release-notes/overview",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Anthropic positions it for demanding reasoning and long-horizon agentic work."
    },
    {
      "name": "Claude Mythos 5.1",
      "also_known_as": [],
      "family": "Mythos",
      "api_model_ids": [
        "claude-mythos-5-1"
      ],
      "api_alias": null,
      "release_date": "2026-09-01",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "current",
      "access": "verification required",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than September 1, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/mythos-5-1/overview",
      "additional_sources": [
        "https://www.anthropic.com/claude-fable-and-mythos-5-1",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Same capabilities and specifications as Claude Fable 5.1, offered only to organizations verified through Anthropic's verification programs."
    },
    {
      "name": "Claude Opus 5.5",
      "also_known_as": [],
      "family": "Opus",
      "api_model_ids": [
        "claude-opus-5-5"
      ],
      "api_alias": null,
      "release_date": "2026-09-22",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "current",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than September 22, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/opus-5-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/claude-opus-5-5",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": "Anthropic's docs suggest starting with Opus 5.5 for most workloads."
    },
    {
      "name": "Claude Sonnet 5.5",
      "also_known_as": [],
      "family": "Sonnet",
      "api_model_ids": [
        "claude-sonnet-5-5"
      ],
      "api_alias": null,
      "release_date": "2026-09-28",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "current",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than September 28, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/sonnet-5-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/claude-sonnet-5-5",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    },
    {
      "name": "Claude Haiku 5.5",
      "also_known_as": [],
      "family": "Haiku",
      "api_model_ids": [
        "claude-haiku-5-5"
      ],
      "api_alias": null,
      "release_date": "2026-10-07",
      "context_window": "1M tokens",
      "context_window_tokens": 1000000,
      "max_output": "128K tokens",
      "status": "current",
      "access": "general",
      "deprecated_date": null,
      "retirement_date": null,
      "retirement_note": "Not sooner than October 7, 2027",
      "source_url": "https://platform.claude.com/docs/en/models/haiku-5-5/overview",
      "additional_sources": [
        "https://www.anthropic.com/claude-haiku-5-5",
        "https://platform.claude.com/docs/en/release-notes/overview",
        "https://platform.claude.com/docs/en/about-claude/model-deprecations"
      ],
      "notes": null
    }
  ]
}