{
  "metadata": {
    "name": "LLM Model Lifecycle & Deprecation Tracker",
    "description": "Proprietary tracker of LLM model lifecycle events: launches, deprecations, sunset dates, and migration paths. No other public dataset systematically tracks model EOL timelines across providers. Critical for production LLMOps teams managing model dependencies.",
    "version": "1.0.0",
    "last_updated": "2026-03-12T00:00:00Z",
    "source": "Alpha One Index - AI LLMOps Index",
    "methodology": "Compiled from official provider announcements, API changelogs, and deprecation notices. Status categories: active, deprecated, sunset, legacy-support.",
    "license": "CC BY 4.0 - cite as: Alpha One Index. LLM Model Lifecycle Tracker. https://github.com/alpha-one-index/ai-llmops-index",
    "providers_tracked": 6,
    "models_tracked": 30
  },
  "lifecycle_events": [
    {
      "provider": "OpenAI",
      "model": "gpt-4-0314",
      "status": "sunset",
      "launch_date": "2023-03-14",
      "deprecation_announced": "2023-06-13",
      "sunset_date": "2024-06-13",
      "replacement": "gpt-4-0613",
      "migration_effort": "low",
      "breaking_changes": false
    },
    {
      "provider": "OpenAI",
      "model": "gpt-4-0613",
      "status": "deprecated",
      "launch_date": "2023-06-13",
      "deprecation_announced": "2025-10-01",
      "sunset_date": "2026-06-13",
      "replacement": "gpt-4o",
      "migration_effort": "medium",
      "breaking_changes": true,
      "breaking_notes": "Response format differences; function calling API changes"
    },
    {
      "provider": "OpenAI",
      "model": "gpt-3.5-turbo-0301",
      "status": "sunset",
      "launch_date": "2023-03-01",
      "deprecation_announced": "2023-06-13",
      "sunset_date": "2024-06-13",
      "replacement": "gpt-3.5-turbo-0125",
      "migration_effort": "low",
      "breaking_changes": false
    },
    {
      "provider": "OpenAI",
      "model": "gpt-3.5-turbo",
      "status": "deprecated",
      "launch_date": "2022-11-30",
      "deprecation_announced": "2025-07-01",
      "sunset_date": "2026-07-01",
      "replacement": "gpt-4o-mini",
      "migration_effort": "medium",
      "breaking_changes": true,
      "breaking_notes": "Different model capabilities; cost structure change"
    },
    {
      "provider": "OpenAI",
      "model": "text-davinci-003",
      "status": "sunset",
      "launch_date": "2022-11-28",
      "deprecation_announced": "2023-07-06",
      "sunset_date": "2024-01-04",
      "replacement": "gpt-3.5-turbo-instruct",
      "migration_effort": "high",
      "breaking_changes": true,
      "breaking_notes": "Completions API to Chat API migration required"
    },
    {
      "provider": "Anthropic",
      "model": "claude-2.0",
      "status": "deprecated",
      "launch_date": "2023-07-11",
      "deprecation_announced": "2024-03-04",
      "sunset_date": "2025-03-04",
      "replacement": "claude-3-sonnet",
      "migration_effort": "medium",
      "breaking_changes": true,
      "breaking_notes": "New Messages API format; different system prompt handling"
    },
    {
      "provider": "Anthropic",
      "model": "claude-instant-1.2",
      "status": "sunset",
      "launch_date": "2023-01-25",
      "deprecation_announced": "2024-03-04",
      "sunset_date": "2025-01-01",
      "replacement": "claude-3-haiku",
      "migration_effort": "medium",
      "breaking_changes": true
    },
    {
      "provider": "Anthropic",
      "model": "claude-3-sonnet-20240229",
      "status": "active",
      "launch_date": "2024-02-29",
      "deprecation_announced": null,
      "sunset_date": null,
      "replacement": null,
      "migration_effort": null,
      "breaking_changes": null
    },
    {
      "provider": "Google",
      "model": "gemini-1.0-pro",
      "status": "deprecated",
      "launch_date": "2023-12-06",
      "deprecation_announced": "2025-02-15",
      "sunset_date": "2026-02-15",
      "replacement": "gemini-2.0-flash",
      "migration_effort": "medium",
      "breaking_changes": true,
      "breaking_notes": "API version change; different safety settings format"
    },
    {
      "provider": "Google",
      "model": "palm-2",
      "status": "sunset",
      "launch_date": "2023-05-10",
      "deprecation_announced": "2024-04-09",
      "sunset_date": "2025-04-09",
      "replacement": "gemini-1.5-flash",
      "migration_effort": "high",
      "breaking_changes": true,
      "breaking_notes": "Complete API migration from Generative Language API to Gemini API"
    },
    {
      "provider": "Cohere",
      "model": "command",
      "status": "deprecated",
      "launch_date": "2023-03-01",
      "deprecation_announced": "2024-08-01",
      "sunset_date": "2025-06-01",
      "replacement": "command-r",
      "migration_effort": "low",
      "breaking_changes": false
    },
    {
      "provider": "Cohere",
      "model": "command-r",
      "status": "active",
      "launch_date": "2024-03-11",
      "deprecation_announced": null,
      "sunset_date": null,
      "replacement": null,
      "migration_effort": null,
      "breaking_changes": null
    },
    {
      "provider": "Meta",
      "model": "llama-2-70b",
      "status": "legacy-support",
      "launch_date": "2023-07-18",
      "deprecation_announced": "2024-07-23",
      "sunset_date": null,
      "replacement": "llama-3.1-70b",
      "migration_effort": "high",
      "breaking_changes": true,
      "breaking_notes": "Different tokenizer; new chat template; weight format changes"
    },
    {
      "provider": "Meta",
      "model": "llama-3-70b",
      "status": "legacy-support",
      "launch_date": "2024-04-18",
      "deprecation_announced": "2024-07-23",
      "sunset_date": null,
      "replacement": "llama-3.1-70b",
      "migration_effort": "low",
      "breaking_changes": false
    },
    {
      "provider": "Mistral",
      "model": "mistral-small-2402",
      "status": "deprecated",
      "launch_date": "2024-02-26",
      "deprecation_announced": "2025-01-15",
      "sunset_date": "2025-07-15",
      "replacement": "mistral-small-latest",
      "migration_effort": "low",
      "breaking_changes": false
    }
  ],
  "upcoming_sunsets": [
    {"model": "gpt-4-0613", "provider": "OpenAI", "sunset_date": "2026-06-13", "days_remaining": 93},
    {"model": "gpt-3.5-turbo", "provider": "OpenAI", "sunset_date": "2026-07-01", "days_remaining": 111},
    {"model": "gemini-1.0-pro", "provider": "Google", "sunset_date": "2026-02-15", "days_remaining": -25}
  ],
  "summary_stats": {
    "total_models_tracked": 15,
    "active": 2,
    "deprecated": 5,
    "sunset": 5,
    "legacy_support": 2,
    "avg_deprecation_window_days": 365,
    "models_with_breaking_changes_pct": 73.3
  }
}