Claude Sonnet 5.5 vs Muse Spark 1.2
Claude Sonnet 5.5 
Muse Spark 1.2 Verdict
- Claude Sonnet 5.5 (max) leads on quality: 67.6 vs 62.7.
- Claude Sonnet 5.5 (max) is stronger in agents & tools, coding, composite, long context, maths, reasoning.
- Muse Spark 1.2 (xhigh) is stronger in knowledge, human preference, multimodal.
- Muse Spark 1.2 (xhigh) is 2.0× cheaper ($2.00 vs $4.00 per 1M blended).
- Muse Spark 1.2 (xhigh) streams 2.3× faster (325 vs 141 tokens per second).
| Metric | Claude Sonnet 5.5 (max) | Muse Spark 1.2 (xhigh) |
|---|---|---|
| BenchLeader Index | 67.6 | 62.7 |
| Agents & tools score | 69.5 | 55.9 |
| Coding score | 69.8 | 55.0 |
| Composite score | 72.6 | 66.6 |
| Knowledge score | 65.4 | 66.9 |
| Long context score | 66.6 | 64.7 |
| Maths score | 72.9 | 66.7 |
| Reasoning score | 81.1 | 69.8 |
| Human preference score | – | 69.1 |
| Multimodal score | – | 65.3 |
| Blended price $/M | $4.00 | $2.00 |
| Output speed | 141 tok/s | 325 tok/s |
| Time to first answer | 487.1 s | 18.2 s |
| Context window | 1M | 1.0M |
| GPQA Diamond | 95.6% | – |
| FrontierMath Tiers 1–3 | 88.8% | – |
| FrontierMath Tier 4 | 80.5% | – |
| OTIS Mock AIME | 100.0% | – |
| SimpleQA Verified | 46.5% | 60.3% |
| Terminal-Bench | 61.8% | – |
| SciCode | 61.0% | 56.4% |
| WeirdML | – | 60.3% |
| APEX-Agents | 75.5% | – |
| ProofBench | 100.0% | – |
| LMArena Text | – | 1492 |
| LMArena Hard Prompts | – | 1508 |
| LMArena Coding | – | 1531 |
| LMArena WebDev | – | 1533 |
| LMArena Vision | – | 1305 |
| LMArena Agent | 12 | -3.7 |
| LiveBench | 75.7% | 78.0% |
| LiveBench Reasoning | 91.6% | 90.0% |
| LiveBench Coding | 91.4% | 77.5% |
| LiveBench Agentic Coding | 56.3% | 57.6% |
| LiveBench Mathematics | 96.1% | 91.2% |
| LiveBench Data Analysis | 59.5% | 76.5% |
| LiveBench Language | 78.0% | 78.6% |
| LiveBench Instruction Following | 56.8% | 74.3% |
| AA Intelligence Index v4.3.2 | 56 | 39.6 |
| AA-LCR | 82.7% | 79.0% |
| AA-Omniscience | 32.3 | 27.2 |
| GPQA Diamond (AA) | – | 90.4% |
| Humanity's Last Exam (AA) | 55.0% | 45.5% |
| SciCode (AA) | 61.0% | 57.4% |
| MMLU-Pro | – | 88.3% |
| IOI | – | 21.8% |
| LegalBench | – | 85.3% |
| CorpFin | – | 70.9% |
| TaxEval | – | 80.4% |
| Terminal-Bench 2.1 (Vals) | – | 69.7% |
| SWE-bench (Vals) | – | 86.6% |
| Vals Index | – | 49.3 |
| CritPt | 31.4% | 17.7% |
| GDPval-AA v2.1 | 67.0% | 48.9% |
| τ³-Banking (AA) | – | 34.9% |
| Analyst Agent (AA) | 57.5% | – |
| BioMysteryBench | – | 64.8% |
| Code Migration | – | 29.9% |
| CyberBench | – | 69.5% |
| Excel Modeling Benchmark | – | 57.0% |
| Finance Agent v2 | – | 60.6% |
| Harvey's Legal Agent Benchmark | – | 25.4% |
| Legal Research Bench | – | 43.8% |
| MedCode | – | 49.4% |
| MedScribe | – | 90.1% |
| MMMU-Pro (Vals) | – | 86.1% |
| MortgageTax | – | 65.4% |
| Public Benefits Bench | – | 68.5% |
| SAGE | – | 47.7% |
| SkillsBench | – | 53.0% |
| Tax Agent Bench | – | 56.9% |
| Terminal-Bench 4.0 (Vals) | – | 6.1% |
| Vibe Code Bench v1.1 | – | 79.1% |
| LMArena Maths | – | 1481 |
| LMArena Creative Writing | – | 1454 |
| LMArena Instruction Following | – | 1471 |
| LMArena Multi-turn | – | 1506 |
| LMArena Longer Queries | – | 1489 |
| Mystery Game Puzzles | 65.0% | – |
| DeepSWE v1.1 | – | 54.9% |
| LMCA | – | 48.4% |
| DTBench | – | 94.7% |
| CursorBench | 55.5% | – |
| GDP.pdf | – | 16.0% |
| FrontierSWE | 61.9% | 12.0% |
| Terminal-Bench 4.0 (AA) | 63.6% | 7.1% |
| Terminal-Bench 2.1 (AA) | – | 80.2% |
| AutomationBench | 71.8% | – |
| GDP.pdf | 25.8% | – |
| MLCR | 75.0% | – |
| Harvey LAB | 2.8% | – |
| AA-Omniscience: accuracy | 54.0% | 45.4% |
| AA-Omniscience: non-hallucination | 53.0% | 66.7% |
| AA-Briefcase v1.1 | 1823 | – |
Data as of 2026-10-11. Best configuration of each model; every score links to its source on the model pages.
Claude Sonnet 5.5 vs Muse Spark 1.2: questions
- Is Claude Sonnet 5.5 better than Muse Spark 1.2?
- Claude Sonnet 5.5 (max) leads on quality: 67.6 vs 62.7. The BenchLeader Index combines every independent quality benchmark; Claude Sonnet 5.5 (max) is ahead overall as of 2026-10-11, but check the category scores for your use.
- Is Claude Sonnet 5.5 better than Muse Spark 1.2 for coding?
- Claude Sonnet 5.5 scores higher in coding (70 vs 55 on the category index, where 50 is average).
- Is Claude Sonnet 5.5 better than Muse Spark 1.2 for agentic tasks?
- Claude Sonnet 5.5 scores higher in agentic tasks (70 vs 56 on the category index, where 50 is average).
- Which is cheaper, Claude Sonnet 5.5 or Muse Spark 1.2?
- Muse Spark 1.2 is cheaper: $2.00 against $4.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Sonnet 5.5 or Muse Spark 1.2?
- Muse Spark 1.2 streams faster: 325 against 141 output tokens per second.
- Which has the larger context window?
- Muse Spark 1.2 accepts more context: 1.0M against 1M tokens.