Comparing 2 models
Claude Sonnet 5.5 vs Muse Spark 1.2
Benchmarks through
Verdict
Muse Spark 1.2 places higher on 2 of the 2 tasks where both are ranked. Muse Spark 1.2 costs 1.6x less per input token. Muse Spark 1.2 accepts 1.0x more context.
- Choose Muse Spark 1.2 for Charts & Diagrams (#5), Vision & Documents (#5).
Built from the published task rankings below; ranks come from each task's own weighted benchmarks, so a win on one task says nothing about another.
Measured head to head
Benchmarks both models were run on
| Evaluation | Claude Sonnet 5.5 | Muse Spark 1.2 | Source |
|---|---|---|---|
| Design Arena Coding | 1366 Elo | 1315 Elo | source · 2026-10-16 |
| Design Arena UI | 1378 Elo | 1302 Elo | source · 2026-10-16 |
| Design Arena Website | 1330 Elo | 1315 Elo | source · 2026-10-16 |
| LiveBench Agentic Coding | 56.3% | 57.6% | source · 2026-10-16 |
| LiveBench Coding | 91.4% | 77.5% | source · 2026-10-16 |
| LiveBench Data Analysis | 59.5% | 76.5% | source · 2026-10-16 |
| LiveBench Instruction Following | 56.8% | 74.3% | source · 2026-10-16 |
| LiveBench Language | 78.0% | 78.6% | source · 2026-10-16 |
| LiveBench Math | 96.1% | 91.2% | source · 2026-10-16 |
| LiveBench Reasoning | 91.6% | 90% | source · 2026-10-16 |
| LMArena Agent | 12.5 | -6.5 | source · 2026-10-14 |
| LMArena Agent Bash Recovery | 15 | 5.8 | source · 2026-10-08 |
| LMArena Agent Steerability | 12.3 | -8.3 | source · 2026-10-14 |
| LMArena Agent Task Outcome | 20 | -7.9 | source · 2026-10-14 |
| LMArena Agent Tool Hallucination | 0.5 | 0.2 | source · 2026-10-14 |
| LMArena Creative Writing | 1467 Elo | 1440 Elo | source · 2026-10-15 |
| LMArena Instruction Following | 1488 Elo | 1462 Elo | source · 2026-10-15 |
| LMArena Long Query | 1494 Elo | 1476 Elo | source · 2026-10-15 |
| LMArena Math | 1499 Elo | 1476 Elo | source · 2026-10-15 |
| LMArena Text | 1475 Elo | 1493 Elo | source · 2026-10-15 |
| LMArena Text Factuality | 1474 Elo | 1481 Elo | source · 2026-10-15 |
| LMArena Vision | 1266 Elo | 1293 Elo | source · 2026-10-09 |
| LMArena Vision Diagrams | 1320 Elo | 1317 Elo | source · 2026-10-09 |
| LMArena Vision OCR | 1280 Elo | 1307 Elo | source · 2026-10-09 |
| LMArena WebDev | 1774 Elo | 1533 Elo | source · 2026-10-13 |
| SimpleQA Verified (Epoch AI) | 46.5% ± 1.6 | 60.3% ± 1.6 | source · 2026-09-29 |
Values are as published by each evaluator, in its own units; rows from different evaluators are not on a common scale.
task evidence
How they place when the question changes
Lower ranks are better. “Best” marks the strongest option in this shortlist for that task.