Model comparison
Muse Spark 1.2 vs Step 2 16k Exp 202412
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 39.2 on the Noometry Index.
Last verified . 12 shared benchmarks.
Meta
StepFunSummary
- They share 12 benchmarks with published results for both. Muse Spark 1.2 scores higher in 8 categories and Step 2 16k Exp 202412 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 51.3 to 25.9.
Side by side
| Muse Spark 1.2 | Step 2 16k Exp 202412 | |
|---|---|---|
| Provider | Meta | StepFun |
| Noometry Index | 50.3 | 39.2 |
| Released | 2026-08-05 | — |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 131K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $4.25 | — |
| Results tracked | 31 | 12 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Muse Spark 1.2 leads
Muse Spark 1.2: 49.2 (#51), Step 2 16k Exp 202412: 38.5 (#174)
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1495 | 1316 |
| DeepSWE | 54.9% | — |
| LMArena WebDev | 1533 | — |
| FrontierSWE | 12% | — |
| SciCode | 56.4% | — |
| WeirdML | 60.3% | — |
Agentic & Tool Use Not comparable
Muse Spark 1.2: 29.4 (#87), Step 2 16k Exp 202412: —
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| APEX-Agents | 36.4% | — |
| GDP.pdf | 16% | — |
Reasoning Muse Spark 1.2 leads
Muse Spark 1.2: 51.3 (#34), Step 2 16k Exp 202412: 25.9 (#142)
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1486 | 1299 |
| SimpleBench | 74.5% | — |
| NYT Connections (extended) | 79.2% | — |
| CritPt | 17.7% | — |
| DTBench | 94.7% | — |
| LMCA | 48.4% | — |
| Epoch Capabilities Index | 154.87 | — |
Math Muse Spark 1.2 leads
Muse Spark 1.2: 46.4 (#70), Step 2 16k Exp 202412: 36.3 (#169)
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | 1471 | 1304 |
| ProofBench | 43% | — |
Knowledge Muse Spark 1.2 leads
Muse Spark 1.2: 54.1 (#53), Step 2 16k Exp 202412: 35.2 (#187)
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1480 | 1279 |
| SimpleQA Verified | 60.3% | — |
Multimodal Not comparable
Muse Spark 1.2: 43.4 (#25), Step 2 16k Exp 202412: —
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Vision | 1305 | — |
Multilingual Muse Spark 1.2 leads
Muse Spark 1.2: 57.1 (#11), Step 2 16k Exp 202412: 43.7 (#181)
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1478 | 1290 |
| LMArena Chinese | 1511 | 1331 |
| LMArena Russian | 1487 | 1324 |
| LMArena French | 1513 | — |
| LMArena Spanish | 1498 | — |
Instruction Following Muse Spark 1.2 leads
Muse Spark 1.2: 76.7 (#36), Step 2 16k Exp 202412: 67.9 (#192)
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1461 | 1287 |
Long Context Muse Spark 1.2 leads
Muse Spark 1.2: 45.2 (#48), Step 2 16k Exp 202412: 39.7 (#170)
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1475 | 1307 |
Writing & Preference Muse Spark 1.2 leads
Muse Spark 1.2: 72.3 (#14), Step 2 16k Exp 202412: 52.3 (#173)
| Benchmark | Muse Spark 1.2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1482 | 1321 |
| LMArena Creative Writing | 1449 | 1328 |
| LMArena Multi-Turn | 1494 | 1292 |
| EQ-Bench Creative Writing | 1840 | — |
Frequently asked questions
Is Muse Spark 1.2 better than Step 2 16k Exp 202412?
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 39.2 on the Noometry Index.
Is Muse Spark 1.2 or Step 2 16k Exp 202412 better for coding?
Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 38.5 in the Noometry coding category.
How many benchmarks do Muse Spark 1.2 and Step 2 16k Exp 202412 share?
12 benchmarks have published results for both models. Muse Spark 1.2 has 31 scored results on Noometry and Step 2 16k Exp 202412 has 12.