{
  "generated": "2026-08-20",
  "count": 46,
  "models": [
    {
      "model": "OpenAI o1",
      "vendor": "OpenAI",
      "vendorDate": "2024-09-12",
      "copilotDate": "2024-10-29",
      "stage": "preview",
      "lagDays": 47,
      "vendorUrl": "https://openai.com/index/introducing-openai-o1-preview/",
      "changelogUrl": null,
      "note": "Vendor date is o1-preview. Full o1 shipped 2024-12-05, so this lag is an upper bound."
    },
    {
      "model": "Claude 3.5 Sonnet",
      "vendor": "Anthropic",
      "vendorDate": "2024-10-22",
      "copilotDate": "2024-11-01",
      "stage": "preview",
      "lagDays": 10,
      "vendorUrl": "https://www.anthropic.com/news/3-5-models-and-computer-use",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "OpenAI o3-mini",
      "vendor": "OpenAI",
      "vendorDate": "2025-01-31",
      "copilotDate": "2025-01-31",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://openai.com/index/openai-o3-mini/",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "Gemini 2.0 Flash",
      "vendor": "Google",
      "vendorDate": "2025-02-05",
      "copilotDate": "2025-02-05",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://blog.google/innovation-and-ai/models-and-research/google-deepmind/gemini-model-updates-february-2025/",
      "changelogUrl": null,
      "note": "Vendor date is general availability; an experimental build existed from 2024-12-11."
    },
    {
      "model": "Claude 3.7 Sonnet",
      "vendor": "Anthropic",
      "vendorDate": "2025-02-24",
      "copilotDate": "2025-02-24",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-3-7-sonnet",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "GPT-4.5",
      "vendor": "OpenAI",
      "vendorDate": "2025-02-27",
      "copilotDate": "2025-02-27",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://openai.com/index/introducing-gpt-4-5/",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "Gemini 2.5 Pro",
      "vendor": "Google",
      "vendorDate": "2025-03-25",
      "copilotDate": "2025-04-11",
      "stage": "preview",
      "lagDays": 17,
      "vendorUrl": "https://blog.google/innovation-and-ai/models-and-research/google-deepmind/gemini-model-thinking-updates-march-2025/",
      "changelogUrl": null,
      "note": "Vendor date is the experimental release. GA was 2025-06-27, which would make the lag negative."
    },
    {
      "model": "GPT-4.1",
      "vendor": "OpenAI",
      "vendorDate": "2025-04-14",
      "copilotDate": "2025-04-14",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://openai.com/index/gpt-4-1/",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "OpenAI o3 / o4-mini",
      "vendor": "OpenAI",
      "vendorDate": "2025-04-16",
      "copilotDate": "2025-04-16",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://openai.com/index/introducing-o3-and-o4-mini/",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "Claude Sonnet 4 / Opus 4",
      "vendor": "Anthropic",
      "vendorDate": "2025-05-22",
      "copilotDate": "2025-05-22",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-4",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "Claude Opus 4.1",
      "vendor": "Anthropic",
      "vendorDate": "2025-08-05",
      "copilotDate": "2025-08-05",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-opus-4-1",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "GPT-5",
      "vendor": "OpenAI",
      "vendorDate": "2025-08-07",
      "copilotDate": "2025-08-07",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://openai.com/index/introducing-gpt-5/",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "GPT-5 mini",
      "vendor": "OpenAI",
      "vendorDate": "2025-08-07",
      "copilotDate": "2025-08-13",
      "stage": "preview",
      "lagDays": 6,
      "vendorUrl": "https://openai.com/index/introducing-gpt-5/",
      "changelogUrl": null,
      "note": null
    },
    {
      "model": "Grok Code Fast 1",
      "vendor": "xAI",
      "vendorDate": "2025-08-28",
      "copilotDate": "2025-08-26",
      "stage": "preview",
      "lagDays": -2,
      "vendorUrl": "https://x.ai/news/grok-code-fast-1",
      "changelogUrl": null,
      "note": "Shipped in Copilot as the stealth model 'sonic' two days before xAI's public announcement."
    },
    {
      "model": "GPT-5-Codex",
      "vendor": "OpenAI",
      "vendorDate": "2025-09-15",
      "copilotDate": "2025-09-23",
      "stage": "preview",
      "lagDays": 8,
      "vendorUrl": "https://openai.com/index/introducing-upgrades-to-codex/",
      "changelogUrl": "https://github.blog/changelog/2025-09-23-openai-gpt-5-codex-is-rolling-out-in-public-preview-for-github-copilot",
      "note": null
    },
    {
      "model": "Claude Sonnet 4.5",
      "vendor": "Anthropic",
      "vendorDate": "2025-09-29",
      "copilotDate": "2025-09-29",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-sonnet-4-5",
      "changelogUrl": "https://github.blog/changelog/2025-09-29-anthropic-claude-sonnet-4-5-is-in-public-preview-for-github-copilot",
      "note": null
    },
    {
      "model": "Claude Haiku 4.5",
      "vendor": "Anthropic",
      "vendorDate": "2025-10-15",
      "copilotDate": "2025-10-15",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-haiku-4-5",
      "changelogUrl": "https://github.blog/changelog/2025-10-15-anthropics-claude-haiku-4-5-is-in-public-preview-for-github-copilot",
      "note": null
    },
    {
      "model": "GPT-5.1 / Codex",
      "vendor": "OpenAI",
      "vendorDate": "2025-11-12",
      "copilotDate": "2025-11-13",
      "stage": "preview",
      "lagDays": 1,
      "vendorUrl": "https://openai.com/index/gpt-5-1/",
      "changelogUrl": "https://github.blog/changelog/2025-11-13-openais-gpt-5-1-gpt-5-1-codex-and-gpt-5-1-codex-mini-are-now-in-public-preview-for-github-copilot",
      "note": null
    },
    {
      "model": "Gemini 3 Pro",
      "vendor": "Google",
      "vendorDate": "2025-11-18",
      "copilotDate": "2025-11-18",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://blog.google/products-and-platforms/products/gemini/gemini-3/",
      "changelogUrl": "https://github.blog/changelog/2025-11-18-gemini-3-pro-is-in-public-preview-for-github-copilot",
      "note": null
    },
    {
      "model": "GPT-5.1-Codex-Max",
      "vendor": "OpenAI",
      "vendorDate": "2025-11-19",
      "copilotDate": "2025-12-04",
      "stage": "preview",
      "lagDays": 15,
      "vendorUrl": "https://openai.com/index/gpt-5-1-codex-max/",
      "changelogUrl": "https://github.blog/changelog/2025-12-04-openais-gpt-5-1-codex-max-is-now-in-public-preview-for-github-copilot",
      "note": null
    },
    {
      "model": "Claude Opus 4.5",
      "vendor": "Anthropic",
      "vendorDate": "2025-11-24",
      "copilotDate": "2025-11-24",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-opus-4-5",
      "changelogUrl": "https://github.blog/changelog/2025-11-24-claude-opus-4-5-is-in-public-preview-for-github-copilot",
      "note": null
    },
    {
      "model": "GPT-5.2",
      "vendor": "OpenAI",
      "vendorDate": "2025-12-11",
      "copilotDate": "2025-12-11",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://openai.com/index/introducing-gpt-5-2/",
      "changelogUrl": "https://github.blog/changelog/2025-12-11-openais-gpt-5-2-is-now-in-public-preview-for-github-copilot",
      "note": null
    },
    {
      "model": "Gemini 3 Flash",
      "vendor": "Google",
      "vendorDate": "2025-12-17",
      "copilotDate": "2025-12-17",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://blog.google/products-and-platforms/products/search/google-ai-mode-update-gemini-3-flash/",
      "changelogUrl": "https://github.blog/changelog/2025-12-17-gemini-3-flash-is-now-in-public-preview-for-github-copilot",
      "note": null
    },
    {
      "model": "GPT-5.2-Codex",
      "vendor": "OpenAI",
      "vendorDate": "2025-12-18",
      "copilotDate": "2026-01-14",
      "stage": "GA",
      "lagDays": 27,
      "vendorUrl": "https://openai.com/index/introducing-gpt-5-2-codex/",
      "changelogUrl": "https://github.blog/changelog/2026-01-14-gpt-5-2-codex-is-now-generally-available-in-github-copilot",
      "note": null
    },
    {
      "model": "Claude Opus 4.6",
      "vendor": "Anthropic",
      "vendorDate": "2026-02-05",
      "copilotDate": "2026-02-05",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-opus-4-6",
      "changelogUrl": "https://github.blog/changelog/2026-02-05-claude-opus-4-6-is-now-generally-available-for-github-copilot",
      "note": null
    },
    {
      "model": "GPT-5.3-Codex",
      "vendor": "OpenAI",
      "vendorDate": "2026-02-05",
      "copilotDate": "2026-02-09",
      "stage": "GA",
      "lagDays": 4,
      "vendorUrl": "https://openai.com/index/introducing-gpt-5-3-codex/",
      "changelogUrl": "https://github.blog/changelog/2026-02-09-gpt-5-3-codex-is-now-generally-available-for-github-copilot",
      "note": null
    },
    {
      "model": "Claude Sonnet 4.6",
      "vendor": "Anthropic",
      "vendorDate": "2026-02-17",
      "copilotDate": "2026-02-17",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-sonnet-4-6",
      "changelogUrl": "https://github.blog/changelog/2026-02-17-claude-sonnet-4-6-is-now-generally-available-in-github-copilot",
      "note": null
    },
    {
      "model": "Gemini 3.1 Pro",
      "vendor": "Google",
      "vendorDate": "2026-02-19",
      "copilotDate": "2026-02-19",
      "stage": "preview",
      "lagDays": 0,
      "vendorUrl": "https://deepmind.google/models/gemini/pro/",
      "changelogUrl": "https://github.blog/changelog/2026-02-19-gemini-3-1-pro-is-now-in-public-preview-in-github-copilot",
      "note": null
    },
    {
      "model": "GPT-5.4",
      "vendor": "OpenAI",
      "vendorDate": "2026-03-05",
      "copilotDate": "2026-03-05",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://openai.com/index/introducing-gpt-5-4/",
      "changelogUrl": "https://github.blog/changelog/2026-03-05-gpt-5-4-is-generally-available-in-github-copilot",
      "note": null
    },
    {
      "model": "GPT-5.4 mini",
      "vendor": "OpenAI",
      "vendorDate": "2026-03-17",
      "copilotDate": "2026-03-17",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://openai.com/index/introducing-gpt-5-4-mini-and-nano/",
      "changelogUrl": "https://github.blog/changelog/2026-03-17-gpt-5-4-mini-is-now-generally-available-for-github-copilot",
      "note": null
    },
    {
      "model": "Claude Opus 4.7",
      "vendor": "Anthropic",
      "vendorDate": "2026-04-16",
      "copilotDate": "2026-04-16",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-opus-4-7",
      "changelogUrl": "https://github.blog/changelog/2026-04-16-claude-opus-4-7-is-generally-available",
      "note": null
    },
    {
      "model": "GPT-5.5",
      "vendor": "OpenAI",
      "vendorDate": "2026-04-23",
      "copilotDate": "2026-04-24",
      "stage": "GA",
      "lagDays": 1,
      "vendorUrl": "https://openai.com/index/introducing-gpt-5-5/",
      "changelogUrl": "https://github.blog/changelog/2026-04-24-gpt-5-5-is-generally-available-for-github-copilot",
      "note": null
    },
    {
      "model": "Gemini 3.5 Flash",
      "vendor": "Google",
      "vendorDate": "2026-05-19",
      "copilotDate": "2026-05-19",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://blog.google/innovation-and-ai/products/google-io-2026/",
      "changelogUrl": "https://github.blog/changelog/2026-05-19-gemini-3-5-flash-is-generally-available-for-github-copilot",
      "note": null
    },
    {
      "model": "Claude Opus 4.8",
      "vendor": "Anthropic",
      "vendorDate": "2026-05-28",
      "copilotDate": "2026-05-28",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-opus-4-8",
      "changelogUrl": "https://github.blog/changelog/2026-05-28-claude-opus-4-8-is-generally-available-for-github-copilot",
      "note": null
    },
    {
      "model": "MAI-Code-1-Flash",
      "vendor": "Microsoft AI",
      "vendorDate": "2026-06-02",
      "copilotDate": "2026-06-02",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://microsoft.ai/news/introducingmai-code-1-flash/",
      "changelogUrl": "https://github.blog/changelog/2026-06-02-mai-code-1-flash-is-now-available-for-github-copilot",
      "note": null
    },
    {
      "model": "Claude Fable 5",
      "vendor": "Anthropic",
      "vendorDate": "2026-06-09",
      "copilotDate": "2026-06-09",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-fable-5-mythos-5",
      "changelogUrl": "https://github.blog/changelog/2026-06-09-claude-fable-5-is-generally-available-for-github-copilot",
      "note": null
    },
    {
      "model": "Kimi K2.7 Code",
      "vendor": "Moonshot AI",
      "vendorDate": "2026-06-12",
      "copilotDate": "2026-07-01",
      "stage": "GA",
      "lagDays": 19,
      "vendorUrl": "https://moonshotai.github.io/",
      "changelogUrl": "https://github.blog/changelog/2026-07-01-kimi-k2-7-is-now-available-in-github-copilot",
      "note": "Vendor date corroborated by third-party coverage only."
    },
    {
      "model": "Claude Sonnet 5",
      "vendor": "Anthropic",
      "vendorDate": "2026-06-30",
      "copilotDate": "2026-06-30",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-sonnet-5",
      "changelogUrl": "https://github.blog/changelog/2026-06-30-claude-sonnet-5-is-generally-available-for-github-copilot",
      "note": null
    },
    {
      "model": "GPT-5.6 Sol/Terra/Luna",
      "vendor": "OpenAI",
      "vendorDate": "2026-07-09",
      "copilotDate": "2026-07-09",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://openai.com/index/introducing-gpt-5-6/",
      "changelogUrl": "https://github.blog/changelog/2026-07-09-openais-gpt-5-6-sol-terra-and-luna-are-now-available-in-github-copilot",
      "note": "A partner preview was available from 2026-06-26; the GA date is used here."
    },
    {
      "model": "Grok 4.5",
      "vendor": "xAI",
      "vendorDate": "2026-07-16",
      "copilotDate": "2026-07-28",
      "stage": "GA",
      "lagDays": 12,
      "vendorUrl": "https://x.ai/news/grok-4-5",
      "changelogUrl": "https://github.blog/changelog/2026-07-28-grok-4-5-is-now-available-in-github-copilot",
      "note": "API access may have preceded the public announcement."
    },
    {
      "model": "Kimi K3",
      "vendor": "Moonshot AI",
      "vendorDate": "2026-07-16",
      "copilotDate": "2026-08-06",
      "stage": "GA",
      "lagDays": 21,
      "vendorUrl": "https://moonshotai.github.io/",
      "changelogUrl": "https://github.blog/changelog/2026-08-06-kimi-k3-is-now-available-in-github-copilot",
      "note": null
    },
    {
      "model": "Gemini 3.6 Flash",
      "vendor": "Google",
      "vendorDate": "2026-07-21",
      "copilotDate": "2026-07-21",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://ai.google.dev/gemini-api/docs/changelog",
      "changelogUrl": "https://github.blog/changelog/2026-07-21-gemini-3-6-flash-is-now-available-in-github-copilot",
      "note": null
    },
    {
      "model": "Claude Opus 5",
      "vendor": "Anthropic",
      "vendorDate": "2026-07-24",
      "copilotDate": "2026-07-24",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://www.anthropic.com/news/claude-opus-5",
      "changelogUrl": "https://github.blog/changelog/2026-07-24-claude-opus-5-is-now-available-in-github-copilot",
      "note": null
    },
    {
      "model": "MAI-Code-1.1-Flash",
      "vendor": "Microsoft AI",
      "vendorDate": "2026-08-11",
      "copilotDate": "2026-08-11",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://microsoft.ai/news/mai-code-1-1-flash-br-better-faster-at-a-quarter-of-the-cost/",
      "changelogUrl": "https://github.blog/changelog/2026-08-11-mai-code-1-1-flash-available-in-github-copilot",
      "note": null
    },
    {
      "model": "Grok 4.6",
      "vendor": "xAI",
      "vendorDate": "2026-08-12",
      "copilotDate": "2026-08-14",
      "stage": "GA",
      "lagDays": 2,
      "vendorUrl": "https://x.ai/news/grok-4-6",
      "changelogUrl": "https://github.blog/changelog/2026-08-14-grok-4-6-is-now-available-in-github-copilot",
      "note": null
    },
    {
      "model": "Gemini 3.7 Flash",
      "vendor": "Google",
      "vendorDate": "2026-08-13",
      "copilotDate": "2026-08-13",
      "stage": "GA",
      "lagDays": 0,
      "vendorUrl": "https://deepmind.google/models/gemini/flash/",
      "changelogUrl": "https://github.blog/changelog/2026-08-13-gemini-3-7-flash-is-now-available-in-github-copilot",
      "note": null
    }
  ]
}