Meta unveils Muse Spark Open, claims it rivals top Chinese models

Meta has unveiled Muse Spark Open, calling it "most capable US open-weight model to date". Built for coding and agentic work, Meta claimed it excels at "complex software engineering" and rivals similar products from top Chinese developers like Alibaba's Qwen. Unlike closed models like OpenAI's ChatGPT, developers can download the parameters of an open-weight model and modify them.