After a rough twelve months, Meta came back on April 9, 2026, with Muse Spark, its most powerful AI model to date. This is the first model from Meta Superintelligence Labs, the AI unit the company assembled under Alexandr Wang after spending $14.3 billion to bring him over from Scale AI. Meta is calling Muse Spark the first step toward personal superintelligence, an AI assistant that understands your world because it is built around it.

This launch marks a shift in Meta strategy, Muse Spark is not open-source. Meta says it "hopes to open-source future versions" but has not committed to any date. Unlike the open-weight Llama models that anyone could download and modify freely, Muse Spark is closed and proprietary. The model is free at meta.ai and in the Meta AI app, with rollout coming to WhatsApp, Instagram, Facebook, Messenger, and Meta's Ray-Ban AI glasses over the next few weeks.

Image: Meta

So, how good is Muse Spark? It scores 52 on the Artificial Analysis Intelligence Index, placing it fifth globally behind GPT-5.4 and Gemini 3.1 Pro at 57 and Claude Opus 4.6 at 53. On health reasoning benchmarks it leads every competitor by a wide distance, and its Contemplating mode outperforms both Gemini Deep Think and GPT-5.4 Pro on Humanity’s Last Exam.

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