Model comparison
Grok 4.20 Multi-Agent vs Muse Spark 1.2
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 46.2 on the Noometry Index.
Last verified . 16 shared benchmarks.
MetaSummary
- They share 16 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 0 categories and Muse Spark 1.2 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Muse Spark 1.2 leads 54.1 to 40.4.
- The biggest single-benchmark swing is NYT Connections (extended): 89.6% for Grok 4.20 Multi-Agent and 79.2% for Muse Spark 1.2.
- Grok 4.20 Multi-Agent is cheaper at $1.25 / $2.50 per million input/output tokens, against $1.25 / $4.25 for Muse Spark 1.2.
- Muse Spark 1.2 accepts more context: 1.05M tokens versus 1M.
Side by side
| Grok 4.20 Multi-Agent | Muse Spark 1.2 | |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 46.2 | 50.3 |
| Released | 2026-03-09 | 2026-08-05 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1.05M |
| Max output | 30K | 131K |
| Input $ / M tokens | $1.25 | $1.25 |
| Output $ / M tokens | $2.50 | $4.25 |
| Results tracked | 20 | 31 |
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Category by category
Coding Muse Spark 1.2 leads
Grok 4.20 Multi-Agent: 43.0 (#92), Muse Spark 1.2: 49.2 (#51)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| LMArena Coding | 1457 | 1495 |
| DeepSWE | — | 54.9% |
| LMArena WebDev | — | 1533 |
| FrontierSWE | — | 12% |
| SciCode | — | 56.4% |
| WeirdML | — | 60.3% |
Agentic & Tool Use Not comparable
Grok 4.20 Multi-Agent: —, Muse Spark 1.2: 29.4 (#87)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| APEX-Agents | — | 36.4% |
| GDP.pdf | — | 16% |
| LMArena Search | 1204 | — |
Reasoning Muse Spark 1.2 leads
Grok 4.20 Multi-Agent: 43.9 (#48), Muse Spark 1.2: 51.3 (#34)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| NYT Connections (extended) | 89.6% | 79.2% |
| LMArena Hard Prompts | 1448 | 1486 |
| SimpleBench | — | 74.5% |
| CritPt | — | 17.7% |
| DTBench | — | 94.7% |
| LMCA | — | 48.4% |
| Epoch Capabilities Index | — | 154.87 |
Math Muse Spark 1.2 leads
Grok 4.20 Multi-Agent: 39.4 (#104), Muse Spark 1.2: 46.4 (#70)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| LMArena Math | 1442 | 1471 |
| ProofBench | — | 43% |
Knowledge Muse Spark 1.2 leads
Grok 4.20 Multi-Agent: 40.4 (#119), Muse Spark 1.2: 54.1 (#53)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| LMArena Expert | 1445 | 1480 |
| SimpleQA Verified | — | 60.3% |
Multimodal Muse Spark 1.2 leads
Grok 4.20 Multi-Agent: 40.5 (#48), Muse Spark 1.2: 43.4 (#25)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | 1259 | 1305 |
Multilingual Muse Spark 1.2 leads
Grok 4.20 Multi-Agent: 54.4 (#43), Muse Spark 1.2: 57.1 (#11)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | 1440 | 1478 |
| LMArena Chinese | 1475 | 1511 |
| LMArena French | 1466 | 1513 |
| LMArena Russian | 1457 | 1487 |
| LMArena Spanish | 1447 | 1498 |
| LMArena German | 1456 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1416 | — |
Instruction Following Muse Spark 1.2 leads
Grok 4.20 Multi-Agent: 74.8 (#84), Muse Spark 1.2: 76.7 (#36)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | 1420 | 1461 |
Long Context Muse Spark 1.2 leads
Grok 4.20 Multi-Agent: 43.7 (#88), Muse Spark 1.2: 45.2 (#48)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | 1431 | 1475 |
Writing & Preference Muse Spark 1.2 leads
Grok 4.20 Multi-Agent: 64.0 (#59), Muse Spark 1.2: 72.3 (#14)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | 1450 | 1482 |
| LMArena Creative Writing | 1436 | 1449 |
| LMArena Multi-Turn | 1452 | 1494 |
| EQ-Bench Creative Writing | — | 1840 |
Frequently asked questions
Is Grok 4.20 Multi-Agent better than Muse Spark 1.2?
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 46.2 on the Noometry Index.
Which is cheaper, Grok 4.20 Multi-Agent or Muse Spark 1.2?
Grok 4.20 Multi-Agent is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; Muse Spark 1.2 lists at $1.25 and $4.25.
Is Grok 4.20 Multi-Agent or Muse Spark 1.2 better for coding?
Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 43.0 in the Noometry coding category.
Which has the bigger context window?
Muse Spark 1.2 does, with 1.05M tokens against 1M.
How many benchmarks do Grok 4.20 Multi-Agent and Muse Spark 1.2 share?
16 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Muse Spark 1.2 has 31.