Model

Muse Spark Open.

Power

Varies

API cost

by Meta

In plain English

A downloadable version of Muse Spark, with 816 billion parameters.

Good for

Organisations that want more control over where it runs and where their data goes.

Things to be aware of

Open weight doesn't mean open source, and even the smaller version is about 537GB. Running it is a serious infrastructure job.

What Meta says

“Meta calls it “the most capable US open-weight model to date”. That is a dated claim from the company selling the model. Compare it with independent tests and your own work.”
Context window
1.0M tokens
Run it yourself
Yes, under Meta's Muse licence

Also from Meta