{
  "$schema": "https://changespec.org/schema/v1/vendor.json",
  "specversion": "1.0",
  "generated_at": "2026-05-12T10:23:48Z",
  "vendor": {
    "slug": "anthropic",
    "name": "Anthropic",
    "url": "https://www.anthropic.com",
    "docs_url": "https://docs.anthropic.com",
    "changelog_url": "https://docs.anthropic.com/en/release-notes/api",
    "rss_url": "https://changespec.com/v/anthropic.rss",
    "description": "AI safety company and maker of the Claude family of models. Publishes the Messages API and Workbench.",
    "canonical_url": "https://changespec.com/v/anthropic",
    "json_url": "https://changespec.com/data/vendors/anthropic.json"
  },
  "count": 6,
  "events": [
    {
      "id": "cs_01HY3KXDEPRECATE001",
      "category": "api_deprecation",
      "severity": "medium",
      "title": "claude-2 model deprecated, sunset 2027-01-01",
      "summary": "The claude-2 and claude-2.1 model identifiers are deprecated and will stop accepting requests on 2027-01-01. Applications should migrate to claude-3-5-sonnet-20241022 or later. After the sunset date, requests to deprecated model identifiers will return a 404 error.",
      "published_at": "2026-04-01T10:00:00Z",
      "effective_date": "2026-04-01",
      "sunset_date": "2027-01-01",
      "source_type": "publisher_verified",
      "source_url": "https://docs.anthropic.com/deprecations",
      "migration_hint": "Replace 'claude-2' or 'claude-2.1' with 'claude-3-5-sonnet-20241022' in your model parameter.",
      "migration_url": "https://docs.anthropic.com/models/overview",
      "action_required": true,
      "recommended_reviewers": [
        "engineering"
      ],
      "affected_systems": [
        "Messages API",
        "Legacy Completion API"
      ],
      "tags": [
        "model-deprecation",
        "claude-2",
        "sunset"
      ],
      "specversion": "1.0",
      "vendor_id": "anthropic"
    },
    {
      "id": "cs_01HY3KXANTHROPICMCP002",
      "category": "informational",
      "severity": "low",
      "title": "MCP server registry public beta launched",
      "summary": "Anthropic opened the Model Context Protocol server registry to public submissions. Third-party developers may now submit MCP server packages for review and inclusion. Registry submissions are reviewed within 5 business days.",
      "published_at": "2026-03-28T16:00:00Z",
      "effective_date": "2026-03-28",
      "source_type": "crawled",
      "confidence_score": 0.92,
      "source_url": "https://docs.anthropic.com/mcp/registry",
      "action_required": false,
      "recommended_reviewers": [
        "engineering"
      ],
      "tags": [
        "mcp",
        "registry",
        "beta"
      ],
      "specversion": "1.0",
      "vendor_id": "anthropic"
    },
    {
      "id": "cs_01HY3KXANTHROPICRATE003",
      "category": "api_breaking",
      "severity": "high",
      "title": "Rate limits on claude-3-opus-20240229 reduced 40% for tier-1 accounts",
      "summary": "Effective 2026-04-15, Tier 1 accounts will see a 40% reduction in requests-per-minute limits for claude-3-opus-20240229. This does not affect Tier 2 or higher accounts. The change is intended to encourage migration to claude-3-5-sonnet-20241022 which has 2x higher rate limits.",
      "published_at": "2026-04-08T09:00:00Z",
      "effective_date": "2026-04-15",
      "source_type": "publisher_verified",
      "source_url": "https://docs.anthropic.com/en/api/rate-limits",
      "migration_hint": "Migrate to claude-3-5-sonnet-20241022 to maintain current throughput. Alternatively, upgrade to Tier 2 to retain existing limits on opus.",
      "migration_url": "https://docs.anthropic.com/en/api/rate-limits#rate-limits-by-tier",
      "action_required": true,
      "recommended_reviewers": [
        "engineering"
      ],
      "affected_systems": [
        "Messages API"
      ],
      "tags": [
        "rate-limits",
        "opus",
        "tier-1"
      ],
      "specversion": "1.0",
      "vendor_id": "anthropic"
    },
    {
      "id": "cs_01HY3KXANTHROPICBATCH004",
      "category": "informational",
      "severity": "informational",
      "title": "Batch API now supports up to 100k requests per batch",
      "summary": "The Anthropic Batch API limit increased from 10,000 to 100,000 requests per batch. Existing integrations require no changes. Billing and processing time scale proportionally.",
      "published_at": "2026-03-20T14:00:00Z",
      "effective_date": "2026-03-20",
      "source_type": "crawled",
      "confidence_score": 0.95,
      "source_url": "https://docs.anthropic.com/en/api/creating-message-batches",
      "action_required": false,
      "recommended_reviewers": [
        "engineering"
      ],
      "tags": [
        "batch-api",
        "limits"
      ],
      "specversion": "1.0",
      "vendor_id": "anthropic"
    },
    {
      "id": "cs_01HY3KXANTHROPICTOS005",
      "category": "data_handling",
      "severity": "medium",
      "title": "Data processing agreement updated - EU subprocessors list revised",
      "summary": "Anthropic updated its Data Processing Agreement on 2026-04-10. The EU subprocessors list adds one new provider (infrastructure provider in Frankfurt region) and removes a deprecated analytics vendor. Organizations with strict DPA requirements should review the updated list and obtain sign-off from their data protection officer if required.",
      "published_at": "2026-04-10T12:00:00Z",
      "effective_date": "2026-04-10",
      "source_type": "crawled",
      "confidence_score": 0.88,
      "source_url": "https://www.anthropic.com/legal/privacy",
      "action_required": false,
      "recommended_reviewers": [
        "legal",
        "compliance"
      ],
      "affected_sections": [
        "Section 3 - Subprocessors",
        "Annex I - Processing Details"
      ],
      "tags": [
        "dpa",
        "eu",
        "gdpr",
        "subprocessors"
      ],
      "specversion": "1.0",
      "vendor_id": "anthropic"
    },
    {
      "id": "cs_01HY3KXANTHROPICTOOLS006",
      "category": "api_deprecation",
      "severity": "medium",
      "title": "Legacy tool_use format deprecated in favor of tools parameter",
      "summary": "The experimental tool_use response format from the claude-3 preview period is deprecated. All applications must migrate to the stable tools parameter format. The legacy format will be rejected by the API starting 2026-06-01. The tools format has been stable since claude-3 GA.",
      "published_at": "2026-03-15T10:00:00Z",
      "effective_date": "2026-03-15",
      "sunset_date": "2026-06-01",
      "source_type": "publisher_verified",
      "source_url": "https://docs.anthropic.com/en/api/tool-use",
      "migration_hint": "Replace experimental tool_use blocks with the stable tools parameter format. See migration guide for field-by-field mapping.",
      "migration_url": "https://docs.anthropic.com/en/api/tool-use#migration",
      "action_required": true,
      "recommended_reviewers": [
        "engineering"
      ],
      "affected_systems": [
        "Messages API"
      ],
      "tags": [
        "tool-use",
        "deprecation",
        "claude-3"
      ],
      "specversion": "1.0",
      "vendor_id": "anthropic"
    }
  ]
}