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So it's not open source, you can't download it, but is it any good? It's a good question, because if it's not, Meta's shareholders might start to wonder why the company is so keen to light $135 billion on fire. If Meta is to be believed, Muse Spark is a big improvement over Llama 4. The model boasts performance matching and in many cases besting the top models from OpenAI, Anthropic, and Google. But before you read too far into these benchmark numbers, remember that they're coming from a company that not that long ago was accused of pulling a bait-and-switch in order to make Llama 4 look bette