# Meta Claims Coding Leadership for Muse Spark 1.3, With Its Best Numbers From a Restricted Variant

Meta reports 75.4 percent on DeepSWE 1.1 and 88.8 percent on Terminal-Bench 2.1, but the strongest results come from a version developers cannot broadly access.

- Published: 2026-09-12T06:23:24.914Z
- Canonical: https://polylog.news/ai/2026-09-12/meta-claims-coding-leadership-for-muse-spark-1-3-with-its-be
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Meta AI](https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/), [VentureBeat](https://venturebeat.com/technology/meta-says-muse-spark-1-3-has-frontier-performance-but-its-best-results-come-from-a-model-developers-cant-broadly-use-yet)

Meta released Muse Spark 1.3 on September 2 through Muse Code and the Meta Model API, and Mark Zuckerberg, Meta's chief executive, described it as the company's largest jump yet in coding and agentic work. The published numbers include 75.4…

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