Grok 4.5 vs Muse Spark 1.1
Grok 4.5 
Muse Spark 1.1 Verdict
- Muse Spark 1.1 leads on quality: 64.9 vs 63.4.
- Grok 4.5 is stronger in human preference, knowledge, long context, reasoning.
- Muse Spark 1.1 is stronger in agents & tools, coding, composite, multimodal, instruction following, maths.
- Muse Spark 1.1 is 1.5× cheaper ($2.00 vs $3.00 per 1M blended).
- Muse Spark 1.1 streams 3.5× faster (194 vs 56 tokens per second).
| Metric | Grok 4.5 | Muse Spark 1.1 |
|---|---|---|
| BenchLeader Index | 63.4 | 64.9 |
| Agents & tools score | 58.6 | 62.7 |
| Coding score | 59.9 | 68.2 |
| Composite score | 66.0 | 72.2 |
| Human preference score | 66.9 | 66.0 |
| Knowledge score | 76.0 | 73.1 |
| Long context score | 66.2 | 65.3 |
| Multimodal score | 64.8 | 64.9 |
| Reasoning score | 68.9 | 68.8 |
| Instruction following score | – | 77.8 |
| Maths score | – | 52.2 |
| Blended price $/M | $3.00 | $2.00 |
| Output speed | 56 tok/s | 194 tok/s |
| Time to first answer | 12.7 s | 2.0 s |
| Context window | 500k | 1.0M |
| SimpleQA Verified | – | 57.8% |
| SimpleBench | 70.0% | – |
| SciCode | – | 58.2% |
| WeirdML | 46.4% | – |
| APEX-Agents | 34.2% | 41.9% |
| FrontierCode | 42.4% | – |
| ProofBench | – | 39.0% |
| Epoch Capabilities Index | 153.9 | 154.6 |
| LMArena Text | 1471 | 1492 |
| LMArena Hard Prompts | 1495 | 1511 |
| LMArena Coding | 1523 | 1531 |
| LMArena WebDev | 1556 | 1541 |
| LMArena Vision | 1291 | 1293 |
| LMArena Agent | 3.9 | -2.6 |
| LiveBench | 75.8% | – |
| LiveBench Reasoning | 87.2% | – |
| LiveBench Coding | 68.6% | – |
| LiveBench Agentic Coding | 56.5% | – |
| LiveBench Mathematics | 90.8% | – |
| LiveBench Data Analysis | 73.0% | – |
| LiveBench Language | 82.8% | – |
| AA Intelligence Index | 39.1 | 34.3 |
| AA-LCR | 79.3% | 77.7% |
| MMMU-Pro | 80.4% | – |
| AA-Omniscience | 25.3 | 28.1 |
| GPQA Diamond (AA) | 93.1% | 89.8% |
| Humanity's Last Exam (AA) | 42.7% | 46.2% |
| SciCode (AA) | 55.0% | 58.8% |
| SWE-Bench Pro | – | 61.5% |
| MCP Atlas | – | 88.1% |
| MultiChallenge | – | 75.3% |
| PRBench Finance | – | 55.0% |
| PRBench Legal | – | 57.0% |
| MultiNRC | – | 65.6% |
| EQ-Bench 4 | – | 1260 |
| Kagi LLM Benchmark | 83.5% | – |
Data as of 2026-09-09. Best configuration of each model; every score links to its source on the model pages.