Meta Platforms (META.O) has released Muse Spark Open, an open-weight AI model targeted at coding and AI agent tasks, but said it has not open-sourced its most capable models. Chief AI officer Alexandr Wang said Muse Spark Open is not the company’s strongest model; Muse Wonder, rolled out earlier this week, remains closed-source. Meta acknowledged Chinese open-weight models still outperform Muse Spark Open on software development and some other tasks. Meta and Apple (AAPL.O) are enabling develope

Meta Platforms (META.O) has released Muse Spark Open, an open-weight AI model targeted at coding and AI agent tasks, but said it has not open-sourced its most capable models. Chief AI officer Alexandr Wang said Muse Spark Open is not the company’s strongest model; Muse Wonder, rolled out earlier this week, remains closed-source. Meta acknowledged Chinese open-weight models still outperform Muse Spark Open on software development and some other tasks. Meta and Apple (AAPL.O) are enabling developers to run Muse Spark Open locally across multiple high-end Macs; Apple has updated its MLX SDK to support the model on Mac devices.