Partially Verified75% confidenceFactExact time
Muse Spark Open has a parameter scale of 816B, with 42B activated parameters.
3
Sources
75%
Confidence
Long-term
Relevance
10/15/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedMuse Spark 1.3 scores 48 on the Artificial Analysis Intelligence Index, just 6 weeks after Muse Wonder's release, an improvement of 4 index points in six weeks.71% similarUnverifiedMuse Spark 1.3 achieved an accuracy rate of 98.1% in ultra-long context tests of one million tokens.70% similarUnverifiedMuse Spark Open's reasoning cannot be turned off; only the low, medium, high, or xhigh effort levels can be selected, and xhigh is the default in the blog post's code examples.70% similarUnverifiedMuse Spark 1.3 has an independent 3000/4M quota pool, and its price is only one-third of Wonder's70% similarUnverifiedThe Muse Spark Open release provides two checkpoints: the BF16 version at about 1.5 TB, and the NVFP4 version, which according to Hugging Face has negligible accuracy loss.69% similar
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