{
  "api_version": "1",
  "updated": "2026-11-05",
  "latest_event": "2026-11-04",
  "rights": "© Frontier Log, all rights reserved.",
  "story": {
    "slug": "what-is-meta-muse",
    "title": "Meta Muse Is a Model Line and an Agent",
    "description": "Muse is the name of Meta's family of AI models, first Muse Spark on Apr 8, 2026, and since Sep 8 also of Meta's personal AI agent, which runs on Muse Spark.",
    "url": "https://frontierlog.ai/stories/what-is-meta-muse",
    "date": "2026-11-04",
    "image": "https://frontierlog.ai/og/story-what-is-meta-muse.png",
    "event": "2026-09-08-muse-agent",
    "tags": [
      "agents",
      "model-releases"
    ],
    "steps": [
      {
        "event": "2026-04-08-muse-spark",
        "date": "2026-04-08",
        "provider": "meta",
        "label": "Muse Spark",
        "note": "First model in the Muse family",
        "key": true
      },
      {
        "event": "2026-07-09-muse-spark-1-1",
        "date": "2026-07-09",
        "provider": "meta",
        "label": "Muse Spark 1.1",
        "note": "1M-token context, Meta Model API",
        "key": false
      },
      {
        "event": "2026-08-05-muse-spark-1-2",
        "date": "2026-08-05",
        "provider": "meta",
        "label": "Muse Spark 1.2",
        "note": "Coding update, with Muse Code",
        "key": false
      },
      {
        "event": "2026-08-12-muse-glimmer",
        "date": "2026-08-10",
        "provider": "meta",
        "label": "Muse Glimmer",
        "note": "30B open weights, runs on one GPU",
        "key": false
      },
      {
        "event": "2026-09-02-muse-spark-1-3",
        "date": "2026-09-02",
        "provider": "meta",
        "label": "Muse Spark 1.3",
        "note": "Max reasoning, longer agent work",
        "key": false
      },
      {
        "event": "2026-09-08-muse-agent",
        "date": "2026-09-08",
        "provider": "meta",
        "label": "Muse",
        "note": "Personal agent, in its own app and WhatsApp",
        "key": true
      },
      {
        "event": "2026-10-12-muse-wonder",
        "date": "2026-10-12",
        "provider": "meta",
        "label": "Muse Wonder and Wonder Full",
        "note": "Meta's most capable models",
        "key": false
      },
      {
        "event": "2026-10-15-muse-spark-open",
        "date": "2026-10-15",
        "provider": "meta",
        "label": "Muse Spark Open",
        "note": "816B open weights, 42B active",
        "key": false
      }
    ],
    "tables": [],
    "cites": [
      {
        "url": "https://about.fb.com/news/2026/09/introducing-muse-small-business/",
        "by": "Meta",
        "medium": "newsroom post",
        "date": "2026-09-29"
      },
      {
        "url": "https://about.fb.com/news/2026/10/muse-is-now-available-in-singapore-the-worlds-first-personal-ai-agent-built-for-everyone/",
        "by": "Meta",
        "medium": "newsroom post",
        "date": "2026-10-27"
      }
    ],
    "sources": [
      "https://ai.meta.com/blog/introducing-muse-spark-msl/",
      "https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/",
      "https://research.meta.ai/blog/introducing-muse-code-and-muse-spark-1-2",
      "https://dev.meta.ai/resources/blog/build-with-muse-glimmer",
      "https://research.meta.ai/blog/introducing-muse-glimmer-open-agentic-model",
      "https://dev.meta.ai/resources/blog/muse-code-new-plans-and-features",
      "https://research.meta.ai/blog/introducing-muse-spark-1-3",
      "https://about.fb.com/news/2026/09/introducing-muse-personal-ai-agent/",
      "https://about.fb.com/news/2026/09/introducing-muse-small-business/",
      "https://about.fb.com/news/2026/10/muse-is-now-available-in-singapore-the-worlds-first-personal-ai-agent-built-for-everyone/",
      "https://research.meta.ai/blog/muse-wonder",
      "https://dev.meta.ai/resources/blog/build-with-muse-spark-open"
    ],
    "body": [
      {
        "figure": "main"
      },
      {
        "p": "Meta Muse is two things. It is the name of the family of AI models from Meta Superintelligence Labs, which began with [Muse Spark](https://frontierlog.ai/model/muse-spark) on [Apr 8, 2026](https://ai.meta.com/blog/introducing-muse-spark-msl/). Since [Sep 8](https://about.fb.com/news/2026/09/introducing-muse-personal-ai-agent/), it is also the name of Meta's personal AI agent, Muse, which Meta says is \"powered by Muse Spark\". A separate product, Muse Code, is Meta's coding agent for the terminal."
      },
      {
        "h": "The models: Spark, Wonder and two open-weight models"
      },
      {
        "p": "Meta introduced Muse Spark on Apr 8 as \"the first in the Muse family of models developed by Meta Superintelligence Labs\", available at meta.ai and in the Meta AI app, the company said in [its launch post](https://ai.meta.com/blog/introducing-muse-spark-msl/). [Muse Spark 1.1](https://frontierlog.ai/model/muse-spark-1-1) followed on [Jul 9](https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/) with a 1-million-token context window and a public preview of the Meta Model API. [Muse Spark 1.2](https://frontierlog.ai/model/muse-spark-1-2), a coding-focused update, came on [Aug 5](https://research.meta.ai/blog/introducing-muse-code-and-muse-spark-1-2), and [Muse Spark 1.3](https://frontierlog.ai/model/muse-spark-1-3) on [Sep 2](https://research.meta.ai/blog/introducing-muse-spark-1-3), available \"in Muse Code and in Meta Model API\"."
      },
      {
        "p": "On [Oct 12](https://research.meta.ai/blog/muse-wonder), Meta introduced [Muse Wonder](https://frontierlog.ai/model/muse-wonder) and [Muse Wonder Full](https://frontierlog.ai/model/muse-wonder-full), which it called \"our most capable models\". Muse Wonder is available through the Meta Model API and Muse Code, and Muse Wonder Full to Muse Code subscribers. Meta said Muse Wonder \"will soon power experiences in Muse, and will roll out first to subscribers\"."
      },
      {
        "p": "Two Muse models have open weights. Meta released Muse Glimmer, a 30-billion-parameter model under Apache 2.0, on [Aug 10](https://research.meta.ai/blog/introducing-muse-glimmer-open-agentic-model), and said it is small enough to run \"on a Mac or PC with a single consumer GPU\". A [developer-blog post](https://dev.meta.ai/resources/blog/build-with-muse-glimmer) dated Aug 12 says \"This week, we released Muse Glimmer\". Muse Spark Open, released on [Oct 15](https://dev.meta.ai/resources/blog/build-with-muse-spark-open), is \"the open weights version of Muse Spark\": an 816-billion-parameter mixture-of-experts model that activates about 42 billion parameters per token."
      },
      {
        "h": "The agents: Muse and Muse Code"
      },
      {
        "p": "Meta introduced Muse, the personal agent, on [Sep 8](https://about.fb.com/news/2026/09/introducing-muse-personal-ai-agent/). People talk to it \"in the Muse app or directly in WhatsApp\", and it runs on Muse Secure VM, \"a dedicated, virtual machine (VM) that houses both the agent and a person’s data\". It was rolling out in the US on iOS, Android and muse.ai. Meta's [Sep 29 post](https://about.fb.com/news/2026/09/introducing-muse-small-business/) on Muse for Small Business described it as available in the US and Canada, and Meta made it [available in Singapore](https://about.fb.com/news/2026/10/muse-is-now-available-in-singapore-the-worlds-first-personal-ai-agent-built-for-everyone/) on Oct 27."
      },
      {
        "p": "Muse Code came first, on [Aug 5](https://research.meta.ai/blog/introducing-muse-code-and-muse-spark-1-2), as \"a terminal coding agent powered by Muse Spark 1.2\", in beta. Meta took it [out of beta on Aug 31](https://dev.meta.ai/resources/blog/muse-code-new-plans-and-features), with monthly subscription plans and a developer preview of its SDK."
      },
      {
        "h": "Muse and Meta AI"
      },
      {
        "p": "Muse Spark first shipped on [Apr 8](https://ai.meta.com/blog/introducing-muse-spark-msl/) in Meta AI, at meta.ai and in the Meta AI app. Muse, the agent, has its own app and website, muse.ai, and works through WhatsApp."
      },
      {
        "table": {
          "cols": [
            "Date",
            "Name",
            "Kind",
            "What it is"
          ],
          "rows": [
            [
              "[Apr 8](https://ai.meta.com/blog/introducing-muse-spark-msl/)",
              "Muse Spark",
              "Model",
              "First model in the Muse family"
            ],
            [
              "[Jul 9](https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/)",
              "Muse Spark 1.1",
              "Model",
              "1M-token context, Meta Model API"
            ],
            [
              "[Aug 5](https://research.meta.ai/blog/introducing-muse-code-and-muse-spark-1-2)",
              "Muse Spark 1.2",
              "Model",
              "Coding-focused update"
            ],
            [
              "[Aug 5](https://research.meta.ai/blog/introducing-muse-code-and-muse-spark-1-2)",
              "Muse Code (beta)",
              "Coding agent",
              "Terminal coding agent"
            ],
            [
              "[Aug 10](https://research.meta.ai/blog/introducing-muse-glimmer-open-agentic-model)",
              "Muse Glimmer",
              "Open-weight model",
              "30B, runs on one GPU"
            ],
            [
              "[Aug 31](https://dev.meta.ai/resources/blog/muse-code-new-plans-and-features)",
              "Muse Code",
              "Coding agent",
              "Out of beta, subscription plans"
            ],
            [
              "[Sep 2](https://research.meta.ai/blog/introducing-muse-spark-1-3)",
              "Muse Spark 1.3",
              "Model",
              "Max reasoning, longer agent work"
            ],
            [
              "[Sep 8](https://about.fb.com/news/2026/09/introducing-muse-personal-ai-agent/)",
              "Muse",
              "Personal agent",
              "In the Muse app and WhatsApp, runs on Muse Spark"
            ],
            [
              "[Oct 12](https://research.meta.ai/blog/muse-wonder)",
              "Muse Wonder and Muse Wonder Full",
              "Model",
              "Meta's most capable models"
            ],
            [
              "[Oct 15](https://dev.meta.ai/resources/blog/build-with-muse-spark-open)",
              "Muse Spark Open",
              "Open-weight model",
              "816B, 42B active"
            ]
          ]
        }
      }
    ],
    "events": [
      "2026-04-08-muse-spark",
      "2026-07-09-muse-spark-1-1",
      "2026-08-05-muse-spark-1-2",
      "2026-08-12-muse-glimmer",
      "2026-08-31-muse-code-out-of-beta",
      "2026-09-02-muse-spark-1-3",
      "2026-09-08-muse-agent",
      "2026-10-12-muse-wonder",
      "2026-10-15-muse-spark-open"
    ],
    "stories": [],
    "models": [
      "muse-spark",
      "muse-spark-1-1",
      "muse-spark-1-2",
      "muse-spark-1-3",
      "muse-wonder",
      "muse-wonder-full"
    ]
  }
}