Open source · 21 October 2026
Meta releases Muse Spark Open weights
Meta published Muse Spark Open, which it calls the most capable US open-weight model, downloadable from Hugging Face, SageMaker, Google Cloud and Microsoft Foundry (listed Oct 15).
Why it matters
Gives you another open option when weighing build-versus-API for features.
For product managers
For your product
What does this mean for your product?
Try it on your product More from this issueAll AI news from 21 Oct →
Get this every morning, written for your product.
Deltaday reads the whole AI news cycle and tells you what changed, whether it's real yet, and what to do about it.