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Step 5 Preview
Muse Spark 1.1
Muse Spark 1.1 is a proprietary model from Meta, released Jul 16, 2026. It ranks #22 of 351 on the LMArena text leaderboard with a rating of 1478. It costs $1.25 per million input tokens and $4.25 per million output tokens, with a 1M-token context window.
- Developer
- Meta
- Released
- Jul 16, 2026
- Context window
- 1M
- Price in / out, per 1M tokens
- $1.25 / $4.25
- Weights
- Proprietary
- Inputs
- Text, Images, Video, Files
- Reasoning
- Yes
- Tool use
- Yes
The rating LMArena published at each update since Jul 10, 2026. Ratings move as votes come in and new models join.
Benchmarks
| Benchmark | Score bar | Accuracy | Rank | Cost / test |
|---|---|---|---|---|
| SWE-benchCoding | 82.00% | 20 / 85 | $0.35 | |
| Vibe Code BenchCoding | 72.16% | 40 / 115 | $0.92 | |
| LiveCodeBenchCoding | 85.91% | 29 / 143 | $1.25 / $4.25 | |
| Legal Research BenchLaw | 37.98% | 39 / 85 | $0.38 | |
| GPQA DiamondReasoning | 91.16% | 23 / 138 | $1.25 / $4.25 | |
| MMLU-ProReasoning | 88.73% | 17 / 138 | $1.25 / $4.25 | |
| MMMUReasoning | 86.59% | 18 / 93 | $1.25 / $4.25 |
Vals AI, as of Oct 24, 2026.
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| TextLMArena | 1478 | 22 / 351 | 46.1K |
| CodingLMArena | 1498 | 28 / 346 | 12.7K |
| MathLMArena | 1481 | 33 / 339 | 2.2K |
| Creative writingLMArena | 1435 | 57 / 349 | 9.7K |
| Instruction followingLMArena | 1456 | 45 / 351 | 16.5K |
| Hard promptsLMArena | 1485 | 27 / 351 | 30.4K |
| Multi-turnLMArena | 1484 | 20 / 349 | 7K |
| Long queriesLMArena | 1461 | 50 / 330 | 21.2K |
| ExpertLMArena | 1478 | 52 / 305 | 5.4K |
| Legal and governmentIndustries | 1482 | 28 / 325 | 4K |
| Medicine and healthcareIndustries | 1480 | 26 / 325 | 3.4K |
| Business and financeIndustries | 1470 | 21 / 344 | 8.7K |
| ChineseLanguages | 1515 | 34 / 328 | 3.6K |
| SpanishLanguages | 1462 | 38 / 249 | 1.5K |
| GermanLanguages | 1469 | 32 / 261 | 825 |
| FrenchLanguages | 1494 | 19 / 252 | 1.6K |
| JapaneseLanguages | 1450 | 32 / 236 | 799 |
| WebDevLMArena | 1543 | 47 / 124 | 8K |
| VisionLMArena | 1293 | 26 / 146 | 12.8K |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown.
Compare Muse Spark 1.1
Meta
Meta’s AI research publishes the Llama family, among the most downloaded open-weight models. Founded 2013 (FAIR), based in Menlo Park. ai.meta.com
Questions
Who makes Muse Spark 1.1?
Muse Spark 1.1 is made by Meta, founded 2013 (FAIR) and based in Menlo Park.
How much does Muse Spark 1.1 cost?
$1.25 per million input tokens and $4.25 per million output tokens, at its provider’s list price.
What is Muse Spark 1.1’s context window?
1M tokens (1,048,576).
How does Muse Spark 1.1 rank?
#22 of 351 on LMArena’s text leaderboard, rated 1478 (95% interval 1474–1482) from 46,121 votes, as of Oct 22, 2026.
Is Muse Spark 1.1 open source?
No. Muse Spark 1.1 is proprietary and served through its provider’s API.