Model comparison
GPT-4.5 vs Muse Spark 1.1
Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 37.2 on the Noometry Index.
Last verified . 19 shared benchmarks.
MetaSummary
- They share 19 benchmarks with published results for both. GPT-4.5 scores higher in 0 categories and Muse Spark 1.1 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.1 leads 47.1 to 13.9.
Side by side
| GPT-4.5 | Muse Spark 1.1 | |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 37.2 | 49.9 |
| Released | 2025-02-27 | 2026-04-08 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 131K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $4.25 |
| Results tracked | 42 | 37 |
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Category by category
Coding Muse Spark 1.1 leads
GPT-4.5: 42.2 (#109), Muse Spark 1.1: 51.3 (#40)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| LMArena Coding | 1396 | 1498 |
| DeepSWE | — | 53.3% |
| Aider Polyglot | 44.9% | — |
| LMArena WebDev | — | 1542 |
| SciCode | — | 58.8% |
| WeirdML | 39.4% | — |
| LiveBench Coding | 75.2% | — |
Agentic & Tool Use Muse Spark 1.1 leads
GPT-4.5: 27.9 (#97), Muse Spark 1.1: 30.8 (#73)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| APEX-Agents | — | 31.8% |
| τ²-bench Banking | — | 40.5% |
| Cybench | 17.5% | — |
| GBAEval | — | 7.9% |
| GDP.pdf | — | 15% |
| Vending-Bench 2 | — | 6,520 |
Reasoning Muse Spark 1.1 leads
GPT-4.5: 13.9 (#330), Muse Spark 1.1: 47.1 (#44)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| LMArena Hard Prompts | 1403 | 1486 |
| Epoch Capabilities Index | 136.74 | 154.21 |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 34.5% | — |
| NYT Connections (extended) | — | 84.9% |
| ARC-AGI-1 | 10.3% | — |
| CritPt | — | 15.1% |
| EnigmaEval | 3.2% | — |
| LiveBench Reasoning | 71.1% | — |
| DTBench | — | 94.4% |
| LiveBench Data Analysis | 64.3% | — |
| LMCA | — | 49.9% |
| Surface Evolver Bench | — | 52.5% |
| ForecastBench | 61.7 | — |
| LiveBench | 69% | — |
Math Muse Spark 1.1 leads
GPT-4.5: 32.6 (#211), Muse Spark 1.1: 45.5 (#76)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| LMArena Math | 1412 | 1483 |
| OTIS Mock AIME 2024-2025 | 37.8% | — |
| ProofBench | — | 39% |
| LiveBench Math | 69.3% | — |
| MATH Level 5 | 78.6% | — |
Knowledge Muse Spark 1.1 leads
GPT-4.5: 32.5 (#211), Muse Spark 1.1: 53.1 (#59)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| LMArena Expert | 1394 | 1478 |
| GPQA Diamond | 68.7% | — |
| Humanity's Last Exam | 5.4% | — |
| SimpleQA Verified | — | 57.8% |
| Confabulations | 13.6% | — |
Multimodal Muse Spark 1.1 leads
GPT-4.5: 37.6 (#71), Muse Spark 1.1: 42.6 (#29)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| LMArena Vision | 1195 | 1293 |
| VPCT | 45% | — |
| LMArena Document | — | 1465 |
Multilingual Muse Spark 1.1 leads
GPT-4.5: 52.5 (#83), Muse Spark 1.1: 56.7 (#17)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| LMArena Non-English | 1413 | 1472 |
| LMArena Chinese | 1421 | 1518 |
| LMArena French | 1418 | 1494 |
| LMArena German | 1457 | 1466 |
| LMArena Japanese | 1416 | 1451 |
| LMArena Korean | 1392 | 1458 |
| LMArena Russian | 1419 | 1483 |
| LMArena Spanish | — | 1464 |
Instruction Following Muse Spark 1.1 leads
GPT-4.5: 72.6 (#134), Muse Spark 1.1: 76.5 (#39)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| LMArena Instruction Following | 1404 | 1457 |
| LiveBench Instruction Following | 72.3% | — |
Long Context Muse Spark 1.1 leads
GPT-4.5: 40.4 (#155), Muse Spark 1.1: 44.8 (#58)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| LMArena Longer Query | 1406 | 1462 |
| Fiction.LiveBench | 63.9% | — |
Writing & Preference Muse Spark 1.1 leads
GPT-4.5: 56.9 (#134), Muse Spark 1.1: 73.4 (#11)
| Benchmark | GPT-4.5 | Muse Spark 1.1 |
|---|---|---|
| LMArena Text | 1417 | 1479 |
| LMArena Creative Writing | 1394 | 1437 |
| EQ-Bench Creative Writing | 1258 | 1927 |
| LMArena Multi-Turn | 1444 | 1485 |
| Short-Story Creative Writing | 75.6% | — |
| EQ-Bench 4 | — | 1260 |
| LiveBench Language | 61.5% | — |
Frequently asked questions
Is GPT-4.5 better than Muse Spark 1.1?
Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 37.2 on the Noometry Index.
Is GPT-4.5 or Muse Spark 1.1 better for coding?
Muse Spark 1.1 scores higher on coding benchmarks: 51.3 versus 42.2 in the Noometry coding category.
How many benchmarks do GPT-4.5 and Muse Spark 1.1 share?
19 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Muse Spark 1.1 has 37.