Meta · released Sep 2, 2026
Muse Spark 1.3
Muse Spark 1.3 is Meta's mid-price model and reads documents well for its cost.
8 weeks oldThinks before answering
- Input price
- $1.25 / M
- Output price
- $4.25 / M
- Context
- 1M tokens
- Longest reply
- 131K
- Reads
- text, image, video, pdf, audio
- Knows up to
- –
Where it shines
- It scores 1471 in the document arena at $1.25 in, $4.25 out.
- It scores 1504 on hard prompts.
Where it struggles
- It has few published benchmark results beyond FrontierMath.
Where you can use it
- Meta APIAPI$1.25 in / $4.25 out per million tokens.
- OpenRouterAPIListed as
meta/muse-spark-1.3
How it scores on each job
Scores run 0 to 100 and blend every measure we have for that job. The number after the dot is its rank among the 33 models in the lineup.
The evidence
| Measure | Score | Rank in lineup | Source |
|---|---|---|---|
| Epoch Capabilities Index | 157 | #16 | Epoch AI |
| LMArena text | 1491 | #6 | LMArena |
| LMArena hard prompts | 1504 | #7 | LMArena |
| LMArena instruction following | 1479 | #12 | LMArena |
| LMArena multi-turn | 1489 | #8 | LMArena |
| LMArena creative writing | 1462 | #11 | LMArena |
| LMArena writing & language | 1470 | #11 | LMArena |
| LMArena coding | 1511 | #6 | LMArena |
| LMArena math | 1502 | #6 | LMArena |
| LMArena business & finance | 1489 | #4 | LMArena |
| LMArena legal & government | 1499 | #6 | LMArena |
| LMArena medicine | 1493 | #9 | LMArena |
| WebDev Arena | 1656 | #12 | LMArena |
| Vision Arena | 1308 | #6 | LMArena |
| Document Arena | 1471 | #5 | LMArena |
| Agent Arena | #15 | #10 | LMArena |
| FrontierMath | 74% | #14 | Epoch AI |
Compare it with these
NewOpen weights
Meta
Muse Spark Open
Muse Spark Open is Meta's new open-weight coding model, and early results put it mid-pack.
Research
- Price
- $1.25 in · $4.25 out
- Context
- 1M
8 weeks old
Gemini 3.8 Flash
Gemini 3.8 Flash gives near-flagship answers for a small fraction of the price.
Everyday questionsResearchImages & screenshots
- Price
- $0.75 in · $3.75 out
- Context
- 1M
3 months old
Alibaba
Qwen3.8 Max
Qwen3.8 Max is Alibaba's flagship and gives solid all-round answers at a low output price.
Websites & appsProfessional work
- Price
- $2 in · $6 out
- Context
- 1M