Meta releases "America's strongest" open weight model Muse Spark Open According to Reuters, on Thursday local time, Meta released Muse Spark Open, an open weight version of its Muse Spark artificial intelligence model for programming and AI agents, further expanding the scope for developers to download and modify

Meta releases "America's strongest" open weight model Muse Spark Open According to Reuters, on Thursday local time, Meta released Muse Spark Open, an open weight version of its Muse Spark artificial intelligence model, for programming and AI agents, further expanding developers' ability to download and transform the technology. Meta Meta stated on its official blog that Muse Spark Open is the most powerful open weight model in the United States to date. It is a native multi-modal model with a total parameter volume of 816 billion, a single run activation parameter volume of 42 billion, and supports a context window of 1 million tokens. The model is purpose-built for programming and agent tasks, and excels in long-term tasks, complex software engineering, and multi-step reasoning. Test results published by Meta show that in the JobBench and MCP-Atlas tool usage tests, Muse Spark Open's performance is ahead of the competitors listed in the table, but in terminal programming, long-cycle software engineering tasks, and GDPVal-AA professional work ability assessment, it lags behind Kimi K3 and GLM 5.3. Muse Spark Open’s running scores “For both security and capability considerations, we usually do not open source the most powerful models. But we do believe that it is very important to continue to open source excellent models over time, and we intend to continue to do so,” Meta chief AI officer Alexandr Wang said in an interview. “Most AI in the world will run on open models, and these models should come from the United States.” Meta also worked with Apple to ensure that Muse Spark Open can be used on two Macs equipped with M5 Ultra chips Studio runs on desktop computers, allowing developers to use the model directly on their own hardware devices without having to rely on a remote server. Developers can now use Muse Spark Open on platforms including Baseten, Fireworks AI, Groq, Modal, Nebius, OpenRouter and Together AI. The model's weights are available for download on Amazon SageMaker AI, Google Cloud Model Garden, and Hugging Face. via cnBeta.COM - Chinese industry information website (author: Source: Phoenix Technology)