Model comparison
Grok 4.20 (Non-Reasoning) vs Muse Spark 1.2
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 48.6 on the Noometry Index.
Last verified . 24 shared benchmarks.
MetaSummary
- They share 24 benchmarks with published results for both. Grok 4.20 (Non-Reasoning) scores higher in 4 categories and Muse Spark 1.2 in 6 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in multimodal, where Muse Spark 1.2 leads 43.4 to 33.3.
- The biggest single-benchmark swing is SimpleQA Verified: 30.2% for Grok 4.20 (Non-Reasoning) and 60.3% for Muse Spark 1.2.
- Grok 4.20 (Non-Reasoning) 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 (Non-Reasoning) | Muse Spark 1.2 | |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 48.6 | 50.3 |
| Released | 2026-02-17 | 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 | 46 | 31 |
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Category by category
Coding Muse Spark 1.2 leads
Grok 4.20 (Non-Reasoning): 42.1 (#112), Muse Spark 1.2: 49.2 (#51)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| LMArena WebDev | 1375 | 1533 |
| WeirdML | 52.3% | 60.3% |
| LMArena Coding | 1459 | 1495 |
| DeepSWE | — | 54.9% |
| FrontierSWE | — | 12% |
| SciCode | — | 56.4% |
| ALE-Bench | 1,150 | — |
Agentic & Tool Use Grok 4.20 (Non-Reasoning) leads
Grok 4.20 (Non-Reasoning): 34.4 (#46), Muse Spark 1.2: 29.4 (#87)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| Terminal-Bench | 57.3% | — |
| APEX-Agents | — | 36.4% |
| τ²-bench Banking | 18% | — |
| GDP.pdf | — | 16% |
| LMArena Search | 1189 | — |
| Vending-Bench 2 | 4,663 | — |
Reasoning Too close to call
Grok 4.20 (Non-Reasoning): 52.3 (#32), Muse Spark 1.2: 51.3 (#34)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| NYT Connections (extended) | 85.4% | 79.2% |
| LMArena Hard Prompts | 1451 | 1486 |
| DTBench | 90.1% | 94.7% |
| LMCA | 38.7% | 48.4% |
| Epoch Capabilities Index | 151.98 | 154.87 |
| ARC-AGI-2 | 65.1% | — |
| SimpleBench | — | 74.5% |
| Kagi LLM Benchmark | 75% | — |
| ARC-AGI-1 | 89.5% | — |
| CritPt | — | 17.7% |
| Chess Puzzles | 24% | — |
| Thematic Generalization | 63.8% | — |
| ForecastBench | 61.4 | — |
Math Grok 4.20 (Non-Reasoning) leads
Grok 4.20 (Non-Reasoning): 48.2 (#65), Muse Spark 1.2: 46.4 (#70)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| ProofBench | 14% | 43% |
| LMArena Math | 1455 | 1471 |
| FrontierMath (Tiers 1-3) | 44.9% | — |
| FrontierMath Tier 4 | 17.1% | — |
| OTIS Mock AIME 2024-2025 | 92.2% | — |
Knowledge Muse Spark 1.2 leads
Grok 4.20 (Non-Reasoning): 52.8 (#60), Muse Spark 1.2: 54.1 (#53)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| SimpleQA Verified | 30.2% | 60.3% |
| LMArena Expert | 1439 | 1480 |
| GPQA Diamond | 89.3% | — |
Multimodal Muse Spark 1.2 leads
Grok 4.20 (Non-Reasoning): 33.3 (#98), Muse Spark 1.2: 43.4 (#25)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | 1263 | 1305 |
| Blueprint-Bench 2 | 0% | — |
| LMArena Document | 1416 | — |
Multilingual Muse Spark 1.2 leads
Grok 4.20 (Non-Reasoning): 54.5 (#40), Muse Spark 1.2: 57.1 (#11)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | 1441 | 1478 |
| LMArena Chinese | 1481 | 1511 |
| LMArena French | 1476 | 1513 |
| LMArena Russian | 1458 | 1487 |
| LMArena Spanish | 1443 | 1498 |
| LMArena German | 1465 | — |
| LMArena Japanese | 1449 | — |
| LMArena Korean | 1417 | — |
Instruction Following Muse Spark 1.2 leads
Grok 4.20 (Non-Reasoning): 74.8 (#83), Muse Spark 1.2: 76.7 (#36)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | 1420 | 1461 |
Long Context Too close to call
Grok 4.20 (Non-Reasoning): 45.5 (#34), Muse Spark 1.2: 45.2 (#48)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | 1437 | 1475 |
| CL-bench | 22.2% | — |
| CL-bench Life | 11.9% | — |
Writing & Preference Muse Spark 1.2 leads
Grok 4.20 (Non-Reasoning): 65.7 (#44), Muse Spark 1.2: 72.3 (#14)
| Benchmark | Grok 4.20 (Non-Reasoning) | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | 1451 | 1482 |
| LMArena Creative Writing | 1438 | 1449 |
| EQ-Bench Creative Writing | 1574 | 1840 |
| LMArena Multi-Turn | 1456 | 1494 |
Frequently asked questions
Is Grok 4.20 (Non-Reasoning) better than Muse Spark 1.2?
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 48.6 on the Noometry Index.
Which is cheaper, Grok 4.20 (Non-Reasoning) or Muse Spark 1.2?
Grok 4.20 (Non-Reasoning) 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 (Non-Reasoning) or Muse Spark 1.2 better for coding?
Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 42.1 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 (Non-Reasoning) and Muse Spark 1.2 share?
24 benchmarks have published results for both models. Grok 4.20 (Non-Reasoning) has 46 scored results on Noometry and Muse Spark 1.2 has 31.