# The Guardian — Meta releases Muse Spark Open, a new ‘open-weight’ AI model

- Company: The Guardian (theguardian.com)
- Announced: 2026-10-16T00:34:28+00:00
- Category: open-weight-release
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://www.theguardian.com/technology/2026/oct/16/meta-releases-muse-spark-open-a-new-open-weight-ai-model
- Record: https://forck.live/items/23197-meta-releases-muse-spark-open-a-new-open-weight-ai-model
- Subject: Reporting
- Open weights: yes
- Models affected: Muse Spark Open

Meta released Muse Spark Open, an open-weight AI model it says excels at multi-step reasoning and complex software engineering. Meta claims it is the most capable US open-weight model to date and that it competes with leading Chinese open-weight models. The model is optimized to run on Apple's M5 Ultra chips.

## Evidence

Verbatim from https://www.theguardian.com/technology/2026/oct/16/meta-releases-muse-spark-open-a-new-open-weight-ai-model:

> "Built for coding and agentic work," Muse Spark Open "excels at long-horizon tasks, complex software engineering, and multi-step reasoning," Meta said in a blogpost, adding that "strong safeguards" have been integrated into the new model.

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