Meta · Open-weight
Muse Spark Open (816B-A42B) New
816B total / 42B active MoE
- Provider
- Meta
- Family
- Muse
- Model type
- Open-weight
- Official release date
- Oct 15, 2026
- Release type
- New model
- Status
- Generally available
- Previous version
- Muse Glimmer 30B (smaller open model)
- Input
- text, image, video, audio
- Output
- text
- Context window
- 1,000,000 tokens
- Max output
- Not documented
- API model id
- Not documented
- API price (input)
- Not verified
- API price (output)
- Not verified
- Price notes
- —
- Consumer apps
- —
- Developer API
- —
- Free access
- None documented
- Paid access
- —
- Availability
- Hugging Face (meta-models)
- Licence
- open-weight (Muse Model License)
Main improvements
- 816B total / 42B active MoE
- 1M token context
- Text, image, video and audio input
Best use cases
- Self-hosted frontier-class model
Benchmarks
No benchmark results recorded. We only list scores with a source, benchmark version and date.
More from Meta
- Muse Spark 1.3 Generally available · Sep 2, 2026
- Muse Glimmer 30B Generally available