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Meta has launched its new Muse Spark model, featuring an advanced chat interface with tools for web browsing, Python coding, and visual grounding. Additionally, the introduction of Llama 4 has raised questions about its long-context capabilities, as early evaluations reveal complexities in its performance and functionality.
A recent article by Simon Willison takes a closer look at Meta’s new hosted model, Muse Spark—and the surprisingly capable tools hiding in meta.ai’s chat UI. From web browsing to Python and visual grounding, there’s a lot to unpack. Read it at simonwillison.net.
In a newly published post, Simon Willison digs into what Meta’s Llama 4 Scout and Maverick actually deliver today—especially around multimodal MoE and eye-popping context claims. His early tests and provider limits paint a more complicated picture. Read more at simonwillison.net/2025/Apr/5/llama-…