GPT-5.1 vs Muse Spark 1.1
GPT-5.1 
Muse Spark 1.1 Verdict
- Muse Spark 1.1 leads on quality: 65.0 vs 59.6.
- GPT-5.1 is stronger in long context.
- Muse Spark 1.1 is stronger in agents & tools, coding, composite, human preference, instruction following, knowledge, multimodal, reasoning, maths.
- Muse Spark 1.1 is 1.7× cheaper ($2.00 vs $3.44 per 1M blended).
- Muse Spark 1.1 streams 2.1× faster (194 vs 91 tokens per second).
| Metric | GPT-5.1 | Muse Spark 1.1 |
|---|---|---|
| BenchLeader Index | 59.6 | 65.0 |
| Agents & tools score | 55.7 | 62.7 |
| Coding score | 47.1 | 68.1 |
| Composite score | 60.3 | 72.3 |
| Human preference score | 63.3 | 66.3 |
| Instruction following score | 71.0 | 77.8 |
| Knowledge score | 66.7 | 73.2 |
| Long context score | 66.6 | 65.4 |
| Multimodal score | 61.8 | 65.0 |
| Reasoning score | 58.7 | 69.2 |
| Maths score | – | 52.2 |
| Blended price $/M | $3.44 | $2.00 |
| Output speed | 91 tok/s | 194 tok/s |
| Time to first answer | 43.1 s | 2.6 s |
| Context window | 400k | 1.0M |
| SimpleQA Verified | – | 57.8% |
| Humanity's Last Exam | 23.7% | – |
| Terminal-Bench | 47.6% | – |
| SciCode | 43.3% | 58.2% |
| APEX-Agents | 17.5% | 41.9% |
| ProofBench | – | 39.0% |
| GSO-Bench | 13.7% | – |
| Epoch Capabilities Index | 149.7 | 154.6 |
| LMArena Text | 1439 | 1492 |
| LMArena Hard Prompts | 1456 | 1511 |
| LMArena Coding | 1475 | 1531 |
| LMArena WebDev | 1341 | 1541 |
| LMArena Vision | 1235 | 1293 |
| LMArena Agent | – | -2.6 |
| AA Intelligence Index | 24.7 | 34.3 |
| IFBench | 72.9% | – |
| AA-LCR | 80.0% | 77.7% |
| MMMU-Pro | 75.5% | – |
| AA-Omniscience | 5.4 | 28.1 |
| Terminal-Bench Hard | 45.5% | – |
| GPQA Diamond (AA) | 87.3% | 89.8% |
| Humanity's Last Exam (AA) | 28.5% | 46.2% |
| SciCode (AA) | – | 58.8% |
| τ²-Bench Telecom (AA) | 81.9% | – |
| SWE-Bench Pro | – | 61.5% |
| MCP Atlas | – | 88.1% |
| MultiChallenge | – | 75.3% |
| PRBench Finance | – | 55.0% |
| PRBench Legal | – | 57.0% |
| MultiNRC | – | 65.6% |
| EQ-Bench 4 | – | 1260 |
| MMMU (validation) | 85.4% | – |
| MMMU-Pro (official) | 76.0% | – |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GPT-5.1 vs Muse Spark 1.1: questions
- Is GPT-5.1 better than Muse Spark 1.1?
- Muse Spark 1.1 leads on quality: 65.0 vs 59.6. The BenchLeader Index combines every independent quality benchmark; Muse Spark 1.1 is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GPT-5.1 better than Muse Spark 1.1 for coding?
- Muse Spark 1.1 scores higher in coding (68 vs 47 on the category index, where 50 is average).
- Is GPT-5.1 better than Muse Spark 1.1 for agentic tasks?
- Muse Spark 1.1 scores higher in agentic tasks (63 vs 56 on the category index, where 50 is average).
- Which is cheaper, GPT-5.1 or Muse Spark 1.1?
- Muse Spark 1.1 is cheaper: $2.00 against $3.44 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.1 or Muse Spark 1.1?
- Muse Spark 1.1 streams faster: 194 against 91 output tokens per second.
- Which has the larger context window?
- Muse Spark 1.1 accepts more context: 1.0M against 400k tokens.