Claude Sonnet 5.5 vs Muse Spark 1.3
Claude Sonnet 5.5 
Muse Spark 1.3 Verdict
- Claude Sonnet 5.5 (max) and Muse Spark 1.3 (max) are level on quality (67.6 vs 67.7).
- Claude Sonnet 5.5 (max) is stronger in coding, maths, reasoning.
- Muse Spark 1.3 (max) is stronger in agents & tools, composite, knowledge, long context, human preference, multimodal.
- Muse Spark 1.3 (max) is 2.0× cheaper ($2.00 vs $4.00 per 1M blended).
| Metric | Claude Sonnet 5.5 (max) | Muse Spark 1.3 (max) |
|---|---|---|
| BenchLeader Index | 67.6 | 67.7 |
| Agents & tools score | 69.5 | 70.3 |
| Coding score | 69.8 | 64.6 |
| Composite score | 72.6 | 84.1 |
| Knowledge score | 65.4 | 72.9 |
| Long context score | 66.6 | 66.8 |
| Maths score | 72.9 | 63.6 |
| Reasoning score | 81.1 | 78.1 |
| Human preference score | – | 69.4 |
| Multimodal score | – | 65.9 |
| Blended price $/M | $4.00 | $2.00 |
| Output speed | 141 tok/s | 175 tok/s |
| Time to first answer | 487.1 s | 70.5 s |
| Context window | 1M | 1.0M |
| GPQA Diamond | 95.6% | – |
| FrontierMath Tiers 1–3 | 88.8% | 74.0% |
| FrontierMath Tier 4 | 80.5% | 46.3% |
| OTIS Mock AIME | 100.0% | – |
| SimpleQA Verified | 46.5% | – |
| Terminal-Bench | 61.8% | – |
| SciCode | 61.0% | 58.8% |
| APEX-Agents | 75.5% | – |
| ProofBench | 100.0% | 58.0% |
| LMArena Text | – | 1494 |
| LMArena Hard Prompts | – | 1517 |
| LMArena Coding | – | 1538 |
| LMArena WebDev | – | 1657 |
| LMArena Vision | – | 1309 |
| LMArena Agent | 12 | 4 |
| LiveBench | 75.7% | – |
| LiveBench Reasoning | 91.6% | – |
| LiveBench Coding | 91.4% | – |
| LiveBench Agentic Coding | 56.3% | – |
| LiveBench Mathematics | 96.1% | – |
| LiveBench Data Analysis | 59.5% | – |
| LiveBench Language | 78.0% | – |
| LiveBench Instruction Following | 56.8% | – |
| AA Intelligence Index v4.3.2 | 56 | 48.1 |
| AA-LCR | 82.7% | 83.0% |
| AA-Omniscience | 32.3 | 25 |
| GPQA Diamond (AA) | – | 93.5% |
| Humanity's Last Exam (AA) | 55.0% | 48.7% |
| SciCode (AA) | 61.0% | 58.8% |
| IOI | – | 56.6% |
| Terminal-Bench 2.1 (Vals) | – | 79.0% |
| Vals Index | – | 58.2 |
| CritPt | 31.4% | 24.9% |
| GDPval-AA v2.1 | 67.0% | 59.0% |
| τ³-Banking (AA) | – | 50.5% |
| ITBench SRE (AA) | – | 33.2% |
| Analyst Agent (AA) | 57.5% | – |
| Code Migration | – | 47.4% |
| CUA-bench | – | 5.8% |
| CyberBench | – | 72.7% |
| Excel Modeling Benchmark | – | 67.4% |
| Finance Agent v2 | – | 60.0% |
| Harvey's Legal Agent Benchmark | – | 23.8% |
| Legal Research Bench | – | 55.3% |
| MysteryMechanism | – | 36.0% |
| Tax Agent Bench | – | 72.4% |
| Terminal-Bench 4.0 (Vals) | – | 24.8% |
| Terminal-Bench Science | – | 10.0% |
| Vibe Code Bench 1-100 | – | 20.5% |
| Vibe Code Bench v1.1 | – | 85.9% |
| LMArena Maths | – | 1502 |
| LMArena Creative Writing | – | 1456 |
| LMArena Instruction Following | – | 1483 |
| LMArena Multi-turn | – | 1487 |
| LMArena Longer Queries | – | 1497 |
| LMArena Document | – | 1468 |
| Chess Puzzles | – | 38.0% |
| Mystery Game Puzzles | 65.0% | 25.0% |
| CursorBench | 55.5% | 41.6% |
| FrontierSWE | 61.9% | – |
| Terminal-Bench 4.0 (AA) | 63.6% | 33.3% |
| Terminal-Bench 2.1 (AA) | – | 84.3% |
| AutomationBench | 71.8% | 57.9% |
| GDP.pdf | 25.8% | 26.6% |
| MLCR | 75.0% | 43.3% |
| Harvey LAB | 2.8% | 8.9% |
| AA-Omniscience: accuracy | 54.0% | 43.6% |
| AA-Omniscience: non-hallucination | 53.0% | 67.1% |
| AA-Briefcase v1.1 | 1823 | 1581 |
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 1.3: questions
- Is Claude Sonnet 5.5 better than Muse Spark 1.3?
- Claude Sonnet 5.5 (max) and Muse Spark 1.3 (max) are level on quality (67.6 vs 67.7). The BenchLeader Index combines every independent quality benchmark; Muse Spark 1.3 (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 1.3 for coding?
- Claude Sonnet 5.5 scores higher in coding (70 vs 65 on the category index, where 50 is average).
- Is Claude Sonnet 5.5 better than Muse Spark 1.3 for agentic tasks?
- Muse Spark 1.3 scores higher in agentic tasks (70 vs 70 on the category index, where 50 is average).
- Which is cheaper, Claude Sonnet 5.5 or Muse Spark 1.3?
- Muse Spark 1.3 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 1.3?
- Muse Spark 1.3 streams faster: 175 against 141 output tokens per second.
- Which has the larger context window?
- Muse Spark 1.3 accepts more context: 1.0M against 1M tokens.