Claude Opus 5 vs Muse Spark 1.1
Claude Opus 5 
Muse Spark 1.1 Verdict
- Claude Opus 5 leads on quality: 70.0 vs 64.9.
- Claude Opus 5 is stronger in agents & tools, coding, composite, human preference, long context, maths, multimodal, reasoning.
- Muse Spark 1.1 is stronger in knowledge, instruction following.
- Muse Spark 1.1 is 5.0× cheaper ($2.00 vs $10.00 per 1M blended).
- Muse Spark 1.1 streams 3.7× faster (194 vs 52 tokens per second).
| Metric | Claude Opus 5 | Muse Spark 1.1 |
|---|---|---|
| BenchLeader Index | 70.0 | 64.9 |
| Agents & tools score | 71.6 | 62.7 |
| Coding score | 74.4 | 68.2 |
| Composite score | 92.9 | 72.2 |
| Human preference score | 78.2 | 66.0 |
| Knowledge score | 70.5 | 73.1 |
| Long context score | 66.2 | 65.3 |
| Maths score | 67.1 | 52.2 |
| Multimodal score | 69.4 | 64.9 |
| Reasoning score | 71.1 | 68.8 |
| Instruction following score | – | 77.8 |
| Blended price $/M | $10.00 | $2.00 |
| Output speed | 52 tok/s | 194 tok/s |
| Time to first answer | 81.6 s | 2.0 s |
| Context window | 1M | 1.0M |
| GPQA Diamond | 92.9% | – |
| OTIS Mock AIME | 97.8% | – |
| SimpleQA Verified | – | 57.8% |
| SimpleBench | 80.6% | – |
| SciCode | – | 58.2% |
| WeirdML | 86.3% | – |
| APEX-Agents | – | 41.9% |
| ProofBench | – | 39.0% |
| Epoch Capabilities Index | 162.6 | 154.6 |
| LMArena Text | – | 1492 |
| LMArena Hard Prompts | – | 1511 |
| LMArena Coding | – | 1531 |
| LMArena WebDev | – | 1541 |
| LMArena Vision | – | 1293 |
| LMArena Agent | – | -2.6 |
| AA Intelligence Index | 50.7 | 34.3 |
| AA-LCR | 79.3% | 77.7% |
| MMMU-Pro | 84.7% | – |
| AA-Omniscience | 37.1 | 28.1 |
| GPQA Diamond (AA) | 93.2% | 89.8% |
| Humanity's Last Exam (AA) | 54.9% | 46.2% |
| SciCode (AA) | 56.4% | 58.8% |
| LiveCodeBench | 89.0% | – |
| MMLU-Pro | 91.6% | – |
| IOI | 91.7% | – |
| LegalBench | 87.0% | – |
| CorpFin | 73.2% | – |
| TaxEval | 75.1% | – |
| Terminal-Bench 2.1 (Vals) | 84.6% | – |
| SWE-bench (Vals) | 97.0% | – |
| GPQA Diamond (Vals) | 93.4% | – |
| Vals Index | 67.2 | – |
| SWE-Bench Pro | – | 61.5% |
| MCP Atlas | – | 88.1% |
| MultiChallenge | – | 75.3% |
| PRBench Finance | – | 55.0% |
| PRBench Legal | – | 57.0% |
| MultiNRC | – | 65.6% |
| HiL-Bench | 57.0% | – |
| EQ-Bench 4 | 1385 | 1260 |
Data as of 2026-09-09. Best configuration of each model; every score links to its source on the model pages.