Claude Sonnet 5 vs Muse Spark 1.2
Claude Sonnet 5 
Muse Spark 1.2 Verdict
- Muse Spark 1.2 leads on quality: 62.7 vs 61.4.
- Claude Sonnet 5 (high) is stronger in agents & tools, human preference, multimodal.
- Muse Spark 1.2 is stronger in coding, composite, knowledge, long context, reasoning, maths.
- Muse Spark 1.2 is 2.0× cheaper ($2.00 vs $4.00 per 1M blended).
- Muse Spark 1.2 streams 3.2× faster (193 vs 60 tokens per second).
| Metric | Claude Sonnet 5 (high) | Muse Spark 1.2 |
|---|---|---|
| BenchLeader Index | 61.4 | 62.7 |
| Agents & tools score | 61.8 | – |
| Coding score | 61.6 | 66.5 |
| Composite score | 69.5 | 79.3 |
| Human preference score | 66.2 | – |
| Knowledge score | 62.4 | 77.1 |
| Long context score | 64.8 | 66.0 |
| Multimodal score | 63.1 | – |
| Reasoning score | 66.8 | 70.7 |
| Maths score | – | 54.3 |
| Blended price $/M | $4.00 | $2.00 |
| Output speed | 60 tok/s | 193 tok/s |
| Time to first answer | 10.0 s | 23.4 s |
| Context window | 1M | 1.0M |
| SimpleBench | – | 74.5% |
| SciCode | 48.6% | – |
| WeirdML | 68.8% | – |
| ProofBench | – | 43.0% |
| Epoch Capabilities Index | – | 155.5 |
| LMArena Text | 1462 | – |
| LMArena Hard Prompts | 1490 | – |
| LMArena Coding | 1521 | – |
| LMArena WebDev | 1538 | – |
| LMArena Vision | 1278 | – |
| LMArena Agent | 6.3 | – |
| AA Intelligence Index | 32.0 | 39.8 |
| AA-LCR | 76.7% | 79.0% |
| AA-Omniscience | -3.7 | 27.2 |
| GPQA Diamond (AA) | – | 90.4% |
| Humanity's Last Exam (AA) | 35.7% | 45.5% |
| SciCode (AA) | 54.3% | 57.4% |
| IOI | – | 49.5% |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
Claude Sonnet 5 vs Muse Spark 1.2: questions
- Is Claude Sonnet 5 better than Muse Spark 1.2?
- Muse Spark 1.2 leads on quality: 62.7 vs 61.4. The BenchLeader Index combines every independent quality benchmark; Muse Spark 1.2 is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is Claude Sonnet 5 better than Muse Spark 1.2 for coding?
- Muse Spark 1.2 scores higher in coding (67 vs 62 on the category index, where 50 is average).
- Which is cheaper, Claude Sonnet 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 or Muse Spark 1.2?
- Muse Spark 1.2 streams faster: 193 against 60 output tokens per second.
- Which has the larger context window?
- Muse Spark 1.2 accepts more context: 1.0M against 1M tokens.