Muse Spark

weights

closed

data

closed

code

closed

license

Proprietary(meta.ai/Meta AI app + private API preview

Meta releases no weights, training corpus or training code for Muse Spark, which is available only in Meta's apps and through its self-serve Model API. Meta has said only that it hopes to open-source future versions of the model.

• https://about.fb.com/news/2026/04/introducing-muse-spark-meta-superintelligence-labs/ recorded 2026-09-29

  Meta newsroom post: "It currently powers the Meta AI app and website" and "will be available in private preview via API to select partners, and we hope to open-source future versions of the model". Searched the body for weights, corpus and training code: no release of any.

• https://arena.ai/leaderboard/text recorded 2026-09-29

  arena.ai text leaderboard, Sep 25, 2026: "View overall rankings across various AI models in text-to-text tasks"; "muse-spark-1.3-max" (Meta · Proprietary) at rank 9, score 1494 +/-7 over 10,036 votes.

• https://developer.meta.com/ai/models/muse-spark/ recorded 2026-09-29

  Meta developer page for Muse Spark 1.3: "Direct, self-serve and affordable access to Muse Spark." through the Meta Model API. Searched the body for weights, download, open-source and license: none offered.

Muse Spark powers Meta's AI assistant on meta.ai and in the Meta AI app, and across WhatsApp, Instagram, Facebook, Messenger and Meta's AI glasses. Meta discloses no Muse Spark-specific user count, so this reading is attributed to the surface it powers rather than to a standalone figure for the model.

• https://about.fb.com/news/2026/04/introducing-muse-spark-meta-superintelligence-labs/ recorded 2026-08-13

  "It currently powers the Meta AI app and website, and will be rolling out to WhatsApp, Instagram, Facebook, Messenger, and AI glasses"; 2026-05-12 update - "When we launched Muse Spark last month, we said we'd bring it everywhere. Today, we are". No Muse Spark user count published.

• https://ai.meta.com/blog/introducing-muse-spark-msl/ recorded 2026-06-04

  Meta's engineering blog for Muse Spark. It answers HTTP 400 to a plain fetch.

Muse Spark 1.3 (max) ranks 9th on the arena.ai text leaderboard, about 15 points behind the top entry, and scores 48 on the Artificial Analysis Intelligence Index against a median of 26. Meta's own benchmark tables are not included here.

• https://arena.ai/leaderboard/text recorded 2026-09-29

  arena.ai text leaderboard, Sep 25, 2026: "View overall rankings across various AI models in text-to-text tasks"; "muse-spark-1.3-max" (Meta · Proprietary) at rank 9, score 1494 +/-7 over 10,036 votes.

• https://artificialanalysis.ai/models/muse-spark-1-3 recorded 2026-09-29

  Artificial Analysis page for Muse Spark 1.3 (max): "scores 48 on the Artificial Analysis Intelligence Index, placing it well above average among other reasoning models in a similar price tier (median: 26)".