Muse Spark Open
MetaOpen weightsReleased Oct 15, 2026
Muse Spark Open has no arena.ai Agents result yet, so on our leaderboard it is listed after models that do. Muse Spark Open is not ranked on LMArena yet; output price $4.25 per 1M tokens.
Quick answer
- Agents leaderboard
- No result yet
- Text (LMArena)
- No result yet
- 17NAS overall
- #75 of 84
- API price (in / out)
- $1.25 / $4.25 per 1M tokens
- Data updated
- Oct 16, 2026 · synced daily
Sources: arena.ai, LMArena, Artificial Analysis, OpenRouter
Key metrics
More from Meta
| # | Model | Arena | Intel. | Output $ | tok/s |
|---|---|---|---|---|---|
| 2 | Muse Wonder | 1508.9 | 52.4 | $20.00 | 174 |
| 9 | Muse Spark 1.3 | 1494.4 | 48.1 | $4.25 | 135 |
| 10 | Muse Spark 1.2 | 1493.1 | 39.6 | $4.25 | – |
| 11 | Muse Spark 1.1 | 1490.2 | 33.7 | $4.25 | – |
| 13 | Muse Spark | 1489.0 | 31.3 | – | – |
| – | Muse Wonder Full | – | 55.8 | – | – |
Pricing
- Official API list price: $1.25 input and $4.25 output per 1M tokens (USD).
- At a typical 3:1 input-to-output ratio, the blended cost is about $2.00 per 1M tokens.
- Among 79 models with an output price, it is the #36 cheapest.
- The cheapest OpenRouter route charges $1.25 input / $4.25 output.
Sources & methodology
Muse Spark Open has no arena.ai Agents result yet, so on our leaderboard it is listed after models that do.
- arena.ai Agents — agent task success rate, 95% interval, sessions and rank (via the public Hugging Face dataset, CC BY 4.0).
- LMArena — Arena score (Text leaderboard with style control, the same view arena.ai shows by default), 95% confidence interval, votes and rank.
- Artificial Analysis — Intelligence / Coding Index, output speed and latency (medians).
- OpenRouter — Route prices, context length and listing date.
Arena scores use the Bradley-Terry model (not Elo); ± is the half-width of the 95% confidence interval. Latency figures are Artificial Analysis medians; for reasoning models, time to first token and to first answer include the thinking phase. Data syncs daily at 14:20 (UTC+8).
Limits: Arena scores come from anonymous users voting on chats, so they reflect conversational preference rather than agent or coding benchmarks; with few votes the interval is wide and ranks move. Prices and speeds change as providers update them.
FAQ
What rank is Muse Spark Open right now?
Muse Spark Open has not been scored by LMArena yet, so it is not ranked here.
What does Muse Spark Open cost via API?
Input $1.25 / output $4.25 per 1M tokens (official API list price; the OpenRouter quote when no official price is available). At a typical 3:1 input-to-output ratio, the blended cost is about $2.00 per 1M tokens.
How fast is Muse Spark Open?
Artificial Analysis measures about 105 output tokens per second, 0.5 s to the first token and 20 s to the first answer token; it is a reasoning model, so latency includes thinking time.
Is Muse Spark Open open source? Can it be self-hosted?
Muse Spark Open is an open-weights model (license: —); you can download the weights and self-host.
What is the context length of Muse Spark Open?
1.05M (1,048,576 tokens, as listed on OpenRouter).
Where does the Muse Spark Open data come from and how often is it updated?
Agent success rates come from the arena.ai Agents leaderboard (CC BY 4.0), Text scores from LMArena, intelligence and speed from Artificial Analysis, and prices and context from official list prices and OpenRouter. 17NAS syncs daily at 06:20 UTC; this page was last updated Oct 16, 2026.