Meta’s steady Muse Spark iteration—1.1 in July, 1.2 in August, and 1.3 on September 2—built strong trader expectations for a quick 1.4+ follow-up, yet the October 15 release of the 816B Muse Spark Open open-weights model and the October debut of frontier Muse Wonder shifted priorities toward larger-scale and accessible releases. The 1.3 update delivered clear gains in long-horizon agentic workflows, tool efficiency, and coding benchmarks via the Meta Model API and Muse Code, but Meta has since emphasized open weights and new product lines over incremental closed-weight versioning. This pivot, combined with no public 1.4+ previews or timelines, has moved market-implied odds for a near-term release sharply lower, with traders now watching earnings calls and API roadmap updates as the next potential catalysts.