The '+' means any version at or above 1.3 counts: if Meta skips 1.3 and releases Muse Spark 1.4 or Muse Spark 2, that still counts for the purpose of this market. Minor changes to the name, or other names for a model generally expected to be called Muse Spark 1.3, will also count.

The model must be accessible without individual vetting or invitation — free or paid, via API or product. Open, non-selective waitlists count. Closed betas, invite-only access, researcher programs, A/B tests, and anonymous benchmark appearances do not. Country-level bans do not prevent resolution.

See also:

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