Meta unveils Muse Spark, a new proprietary AI model

Insights

• Muse Spark is Meta Superintelligence Labs' first major model since hiring Alexandr Wang nine months ago.
• The model will be proprietary, with Meta saying it may open-source future versions.
• Meta says it rebuilt its AI stack to produce smaller models that match midsize Llama 4 performance for an order of magnitude less compute.
• Meta says Muse Spark offers competitive performance in multimodal perception, reasoning, health, and agentic tasks.
• The launch follows the disappointing debut of Llama 4 and marks a strategic pivot from an open-source approach to a proprietary offering.