ai& launches Meta's Muse Spark Open on ai& Inference

ai&, a Japanese AI company focused on inference, has moved quickly to host Meta's newly released open-weight model. The company states a policy of making new models available domestically as soon as possible, often on the same day, and Muse Spark Open is the latest example. By running the model on its own data centers in Japan and committing not to use inputs or outputs for training, ai& aims to address data residency and privacy concerns that can matter to Japanese businesses. The model itself is a native multimodal MoE with 816B total parameters and 42B active parameters, designed for coding and long-running agent tasks, and Meta positions it as the most capable open-weight model from the US. For ai& Inference users, the addition expands the set of models available through an OpenAI-compatible API, though the body does not specify pricing details beyond usage-based billing.