Muse Spark Open
muse
Muse Spark Open is an 816B total / 42B active open-weight multimodal reasoning model from Meta for coding and long-horizon agentic work, with 1M-token context.
ReasoningTool CallingAttachmentsOpen WeightsMuse Model License
Context Window
1.0M
Max Output
131K
Temperature
Yes
Open Weights
Yes
Knowledge Cutoff
2026-01-04
Released
2026-10-15
Last Updated
2026-10-15
License
Muse Model License
Modalities
Input:TextImageVideoAudio
→Output:Text
Benchmarks
| Benchmark | Score | Metric | Harness |
|---|---|---|---|
| Artificial Analysis Intelligence Index | 39 | index score | - |
| JobBench | 61.8 | - | |
| MCP Atlas | 89.2 | - | |
| GDPval-AA | 1401 | Elo | - |
| OSWorld-Verified | 80.4 | - | |
| Toolathlon-Verified | 72.8 | - | |
| HLE-Diamond | 26.1 | - | |
| AA-Omniscience | 25 | - | |
| SciCode | 58.5 | - | |
| Humanity's Last Exam | 61 | - | |
| GPQA Diamond | 89 | - | |
| DeepSWE | 60 | preferred harness | |
| SWE-Atlas Codebase QnA | 58 | preferred harness | |
| Terminal-Bench | 76.4 | Terminus 2 | |
| ZeroBench | 50 | - | |
| BabyVision | 80.2 | - | |
| SimpleVQA | 73.6 | - | |
| WorldVQA | 49.4 | - | |
| IntPhys2 | 68.3 | - | |
| Video-MME | 61.5 | - |
Links
Available Providers (8)
| Provider | Input /1M | Output /1M | Cache Read /1M | Cache Write /1M | Reasoning | Status |
|---|---|---|---|---|---|---|
 Cloudflare AI Gateway | Rp 22.662 | Rp 77.048 | Rp 2.720 | — | effort | — |
 Prime Inference | Rp 22.662 | Rp 77.048 | — | — | effort | — |
 Vercel AI Gateway | Rp 22.662 | Rp 77.048 | Rp 2.720 | — | effort | — |
 Merge Gateway | Rp 22.662 | Rp 77.048 | Rp 2.720 | — | effort | — |
 NanoGPT | Rp 22.662 | Rp 77.048 | Rp 2.720 | — | effort | — |
 ai& | Rp 22.662 | Rp 77.048 | Rp 2.720 | — | effort | — |
 Kilo Gateway | Rp 22.662 | Rp 77.048 | Rp 2.720 | — | effort | — |
 OpenRouter | Rp 22.662 | Rp 77.048 | Rp 2.720 | — | effort | — |