Claude Opus 4.1 vs Muse Spark 1.3
Claude Opus 4.1 
Muse Spark 1.3 Verdict
- Muse Spark 1.3 leads on quality: 68.2 vs 58.3.
- Claude Opus 4.1 (thinking) is stronger in agents & tools, coding, human preference, instruction following, maths, multimodal, reasoning.
- Muse Spark 1.3 is stronger in composite, knowledge, long context.
- Muse Spark 1.3 is 15× cheaper ($2.00 vs $30.00 per 1M blended).
- Muse Spark 1.3 streams 20.7× faster (228 vs 11 tokens per second).
| Metric | Claude Opus 4.1 (thinking) | Muse Spark 1.3 |
|---|---|---|
| BenchLeader Index | 58.3 | 68.2 |
| Agents & tools score | 63.7 | – |
| Coding score | 53.3 | – |
| Composite score | 58.0 | 90.2 |
| Human preference score | 64.5 | – |
| Instruction following score | 52.7 | – |
| Knowledge score | 58.3 | 79.1 |
| Long context score | 64.5 | 68.1 |
| Maths score | 59.3 | – |
| Multimodal score | 56.5 | – |
| Reasoning score | 65.5 | – |
| Blended price $/M | $30.00 | $2.00 |
| Output speed | 11 tok/s | 228 tok/s |
| Time to first answer | 3.2 s | 31.0 s |
| Context window | 200k | 1.0M |
| LMArena Text | 1450 | – |
| LMArena Hard Prompts | 1480 | – |
| LMArena Coding | 1512 | – |
| AA Intelligence Index | 22.9 | 48.2 |
| IFBench | 55.4% | – |
| AA-LCR | 76.0% | 83.0% |
| MMMU-Pro | 67.9% | – |
| AA-Omniscience | – | 25 |
| Terminal-Bench Hard | 34.3% | – |
| GPQA Diamond (AA) | 80.9% | 93.5% |
| Humanity's Last Exam (AA) | 12.5% | 48.7% |
| SciCode (AA) | – | 58.8% |
| τ²-Bench Telecom (AA) | 71.4% | – |
| AIME (Vals) | 78.2% | – |
| LiveCodeBench | 66.5% | – |
| MMLU-Pro | 87.9% | – |
| TaxEval | 73.7% | – |
| MedQA | 93.6% | – |
| MGSM | 94.4% | – |
| GPQA Diamond (Vals) | 76.3% | – |
| MultiChallenge | 57.2% | – |
| PRBench Finance | – | 59.5% |
| PRBench Legal | – | 61.6% |
| VISTA | 48.4% | – |
| MultiNRC | 38.4% | – |
| TutorBench | 50.8% | – |
Data as of 2026-09-15. Best configuration of each model; every score links to its source on the model pages.
Claude Opus 4.1 vs Muse Spark 1.3: questions
- Is Claude Opus 4.1 better than Muse Spark 1.3?
- Muse Spark 1.3 leads on quality: 68.2 vs 58.3. The BenchLeader Index combines every independent quality benchmark; Muse Spark 1.3 is ahead overall as of 2026-09-15, but check the category scores for your use.
- Which is cheaper, Claude Opus 4.1 or Muse Spark 1.3?
- Muse Spark 1.3 is cheaper: $2.00 against $30.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Opus 4.1 or Muse Spark 1.3?
- Muse Spark 1.3 streams faster: 228 against 11 output tokens per second.
- Which has the larger context window?
- Muse Spark 1.3 accepts more context: 1.0M against 200k tokens.