Model comparison
MiMo-V2.5 vs Muse Spark
Muse Spark is the stronger model overall, scoring 50.6 to 43.4 on the Noometry Index.
Last verified . 20 shared benchmarks.
MetaSummary
- They share 20 benchmarks with published results for both. MiMo-V2.5 scores higher in 0 categories and Muse Spark in 9 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Muse Spark leads 65.7 to 40.8.
- The biggest single-benchmark swing is SciCode: 43.1% for MiMo-V2.5 and 51.5% for Muse Spark.
- MiMo-V2.5 has downloadable open weights; the other is API-only.
Side by side
| MiMo-V2.5 | Muse Spark | |
|---|---|---|
| Provider | Xiaomi | Meta |
| Noometry Index | 43.4 | 50.6 |
| Released | 2026-04-22 | 2026-04-08 |
| Weights | Open | Proprietary |
| Context window | 1.05M | — |
| Max output | 131K | — |
| Input $ / M tokens | $0.14 | — |
| Output $ / M tokens | $0.28 | — |
| Results tracked | 23 | 27 |
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Category by category
Coding Muse Spark leads
MiMo-V2.5: 43.9 (#81), Muse Spark: 46.2 (#69)
| Benchmark | MiMo-V2.5 | Muse Spark |
|---|---|---|
| SciCode | 43.1% | 51.5% |
| LMArena Coding | 1469 | 1481 |
| LMArena WebDev | 1438 | — |
| ALE-Bench | 513.95 | — |
Reasoning Muse Spark leads
MiMo-V2.5: 28.6 (#101), Muse Spark: 35.9 (#67)
| Benchmark | MiMo-V2.5 | Muse Spark |
|---|---|---|
| CritPt | 3.7% | 11.3% |
| LMArena Hard Prompts | 1450 | 1474 |
| Epoch Capabilities Index | — | 152.04 |
Math Muse Spark leads
MiMo-V2.5: 36.8 (#163), Muse Spark: 47.8 (#66)
| Benchmark | MiMo-V2.5 | Muse Spark |
|---|---|---|
| ProofBench | 16% | 17% |
| LMArena Math | 1436 | 1455 |
| OTIS Mock AIME 2024-2025 | — | 88.9% |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Tier 4 (v1) | — | 14.6% |
Knowledge Muse Spark leads
MiMo-V2.5: 40.8 (#115), Muse Spark: 65.7 (#13)
| Benchmark | MiMo-V2.5 | Muse Spark |
|---|---|---|
| LMArena Expert | 1460 | 1457 |
| GPQA Diamond | — | 89.8% |
| Humanity's Last Exam | — | 40.6% |
Multimodal Muse Spark leads
MiMo-V2.5: 39.8 (#54), Muse Spark: 43.4 (#24)
| Benchmark | MiMo-V2.5 | Muse Spark |
|---|---|---|
| LMArena Vision | 1247 | 1306 |
| LMArena Document | — | 1444 |
Multilingual Muse Spark leads
MiMo-V2.5: 51.9 (#99), Muse Spark: 56.1 (#24)
| Benchmark | MiMo-V2.5 | Muse Spark |
|---|---|---|
| LMArena Non-English | 1404 | 1464 |
| LMArena Chinese | 1468 | 1509 |
| LMArena French | 1447 | 1497 |
| LMArena German | 1421 | 1497 |
| LMArena Korean | 1363 | 1459 |
| LMArena Russian | 1395 | 1466 |
| LMArena Spanish | 1416 | 1472 |
| LMArena Japanese | 1306 | — |
Instruction Following Too close to call
MiMo-V2.5: 75.5 (#60), Muse Spark: 75.9 (#51)
| Benchmark | MiMo-V2.5 | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1434 | 1442 |
Long Context Too close to call
MiMo-V2.5: 44.2 (#73), Muse Spark: 44.4 (#69)
| Benchmark | MiMo-V2.5 | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1445 | 1451 |
Writing & Preference Muse Spark leads
MiMo-V2.5: 61.6 (#86), Muse Spark: 66.0 (#39)
| Benchmark | MiMo-V2.5 | Muse Spark |
|---|---|---|
| LMArena Text | 1428 | 1474 |
| LMArena Creative Writing | 1393 | 1459 |
| LMArena Multi-Turn | 1445 | 1477 |
Frequently asked questions
Is MiMo-V2.5 better than Muse Spark?
Muse Spark is the stronger model overall, scoring 50.6 to 43.4 on the Noometry Index.
Is MiMo-V2.5 or Muse Spark better for coding?
Muse Spark scores higher on coding benchmarks: 46.2 versus 43.9 in the Noometry coding category.
How many benchmarks do MiMo-V2.5 and Muse Spark share?
20 benchmarks have published results for both models. MiMo-V2.5 has 23 scored results on Noometry and Muse Spark has 27.