Muse Spark 1.3
MetaProprietaryReleased Sep 2, 2026
Muse Spark 1.3 ranks #12 on LMArena (1489.6); official output price $4.25 per 1M tokens.
Key metrics
Rank history
LMArena rank, last 17 days#10 on Sep 23, #12 now; best #10 in this period.
Reasoning effort comparison
Artificial Analysis measurements per reasoning effort of the same model| Effort | Intelligence | Coding | tok/s | TTFT (s) | First answer (s) |
|---|---|---|---|---|---|
| maxUsed in table | 48.1 | 75.8 | 118 | 49 | 66 |
| xhigh | 45.1 | 76.5 | 225 | 19 | 28 |
Models ranked nearby
Sorted by Arena score| # | Model | Arena | Intel. | Output $ | tok/s |
|---|---|---|---|---|---|
| 7 |  MiMo-V2.6-Pro | 1491.7 | 46.3 | $0.87 | 40 |
| 8 |  Claude Fable 5 | 1491.2 | 49.6 | $50.00 | – |
| 9 | Claude Opus 4.7 | 1489.6 | 40.7 | $25.00 | – |
| 10 | Muse Spark 1.3This page | 1489.6 | 48.1 | $4.25 | 118 |
| 11 |  Gemini 3.7 Flash | 1486.0 | 39.1 | $3.75 | – |
| 12 |  Qwen3.8 Max | 1483.3 | 45.4 | $6.00 | 36 |
| 13 | Muse Spark 1.2 | 1482.3 | 39.6 | $4.25 | – |
More from Meta
| # | Model | Arena | Intel. | Output $ | tok/s |
|---|---|---|---|---|---|
| 13 | Muse Spark 1.2 | 1482.3 | 39.6 | $4.25 | – |
| 18 | Muse Spark 1.1 | 1478.6 | 33.7 | $4.25 | – |
| 21 | Muse Spark | 1473.9 | 31.3 | – | – |
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 78 models with an output price, it is the #35 cheapest.
- The cheapest OpenRouter route charges $1.25 input / $4.25 output.
Sources & methodology
Muse Spark 1.3 (Meta): Arena 1489.6 (#12), Intelligence Index 48.1, $1.25 in / $4.25 out per 1M tokens, 1.05M context. Data updated Oct 9, 2026.
- LMArena — Arena score, 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).
FAQ
What rank is Muse Spark 1.3 right now?
Muse Spark 1.3 is #10 on our leaderboard of 68 scored models (Arena score 1489.6); its raw LMArena rank is #12.
What does Muse Spark 1.3 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 1.3?
Artificial Analysis measures about 118 output tokens per second, 49 s to the first token and 66 s to the first answer token; it is a reasoning model, so latency includes thinking time.
How close is Muse Spark 1.3 to the models ranked next to it?
It is 0.0 points behind Claude Opus 4.7 (1489.6) and 3.6 points ahead of Gemini 3.7 Flash (1486.0); gaps smaller than the confidence interval (±5.9) are not significant.
Is Muse Spark 1.3 open source? Can it be self-hosted?
Muse Spark 1.3 is a closed model, available only via official APIs or hosted services.
What is the context length of Muse Spark 1.3?
1.05M (1,048,576 tokens, as listed on OpenRouter).