Muse Spark Open is an 816-billion parameter Mixture-of-Experts model offering large-scale capacity with efficient per-token computation. It supports multimodal inputs and a large context window of one million tokens, enabling processing of entire code projects with dependencies and legacy files.
The model enables multi-step reasoning and tool calling in software engineering workflows and is available in BF16 and NVFP4 quantized variants on SageMaker JumpStart. The NVFP4 variant reduces memory footprint for cost-efficient deployment, with easy one-click deployment in customers' AWS accounts for full control.
Source & further reading
Muse Spark Open model now available on Amazon SageMaker JumpStart ↗Source published 2026-10-15. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.