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Meta releases Muse Spark Open, a new ‘open-weight’ AI model

The Guardian Business · 16 October 2026 at 01:34

Meta releases Muse Spark Open, a new ‘open-weight’ AI model

Meta says Muse excels at ‘multi-step reasoning’ and ‘complex software engineering’ as it races to catch up to Chinese rivals Meta on Thursday launched a new open-weight AI model which it claims rivals, and in some cases outperforms, similar products from leading Chinese developers.

Muse Spark Open “is the most capable US open-weight model to date,” Meta’s chief of AI Alexandr Wang wrote on X.

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Meta releases Muse Spark Open, a new ‘open-weight’ AI model

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