Model comparison
Chatgpt 4o Latest 20250326 vs Muse Spark 1.2
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 43.8 on the Noometry Index.
Last verified . 16 shared benchmarks.
MetaSummary
- They share 16 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 0 categories and Muse Spark 1.2 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 51.3 to 33.8.
Side by side
| Chatgpt 4o Latest 20250326 | Muse Spark 1.2 | |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 43.8 | 50.3 |
| Released | — | 2026-08-05 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 131K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $4.25 |
| Results tracked | 21 | 31 |
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Category by category
Coding Muse Spark 1.2 leads
Chatgpt 4o Latest 20250326: 41.6 (#122), Muse Spark 1.2: 49.2 (#51)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| LMArena Coding | 1413 | 1495 |
| DeepSWE | — | 54.9% |
| LMArena WebDev | — | 1533 |
| FrontierSWE | — | 12% |
| SciCode | — | 56.4% |
| WeirdML | — | 60.3% |
Agentic & Tool Use Not comparable
Chatgpt 4o Latest 20250326: —, Muse Spark 1.2: 29.4 (#87)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| APEX-Agents | — | 36.4% |
| GDP.pdf | — | 16% |
Reasoning Muse Spark 1.2 leads
Chatgpt 4o Latest 20250326: 33.8 (#71), Muse Spark 1.2: 51.3 (#34)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| LMArena Hard Prompts | 1424 | 1486 |
| SimpleBench | — | 74.5% |
| Kagi LLM Benchmark | 75% | — |
| NYT Connections (extended) | — | 79.2% |
| CritPt | — | 17.7% |
| DTBench | — | 94.7% |
| LMCA | — | 48.4% |
| Epoch Capabilities Index | — | 154.87 |
Math Muse Spark 1.2 leads
Chatgpt 4o Latest 20250326: 38.6 (#134), Muse Spark 1.2: 46.4 (#70)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| LMArena Math | 1407 | 1471 |
| ProofBench | — | 43% |
Knowledge Muse Spark 1.2 leads
Chatgpt 4o Latest 20250326: 39.2 (#137), Muse Spark 1.2: 54.1 (#53)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| LMArena Expert | 1401 | 1480 |
| SimpleQA Verified | — | 60.3% |
| Confabulations | 16.6% | — |
Multimodal Muse Spark 1.2 leads
Chatgpt 4o Latest 20250326: 39.6 (#58), Muse Spark 1.2: 43.4 (#25)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | 1243 | 1305 |
Multilingual Muse Spark 1.2 leads
Chatgpt 4o Latest 20250326: 52.9 (#76), Muse Spark 1.2: 57.1 (#11)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | 1419 | 1478 |
| LMArena Chinese | 1457 | 1511 |
| LMArena French | 1446 | 1513 |
| LMArena Russian | 1429 | 1487 |
| LMArena Spanish | 1434 | 1498 |
| LMArena German | 1423 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1396 | — |
Instruction Following Muse Spark 1.2 leads
Chatgpt 4o Latest 20250326: 74.0 (#107), Muse Spark 1.2: 76.7 (#36)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | 1403 | 1461 |
Long Context Muse Spark 1.2 leads
Chatgpt 4o Latest 20250326: 43.1 (#107), Muse Spark 1.2: 45.2 (#48)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | 1413 | 1475 |
Writing & Preference Muse Spark 1.2 leads
Chatgpt 4o Latest 20250326: 62.6 (#72), Muse Spark 1.2: 72.3 (#14)
| Benchmark | Chatgpt 4o Latest 20250326 | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | 1429 | 1482 |
| LMArena Creative Writing | 1405 | 1449 |
| EQ-Bench Creative Writing | 1501 | 1840 |
| LMArena Multi-Turn | 1454 | 1494 |
Frequently asked questions
Is Chatgpt 4o Latest 20250326 better than Muse Spark 1.2?
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 43.8 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or Muse Spark 1.2 better for coding?
Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 41.6 in the Noometry coding category.
How many benchmarks do Chatgpt 4o Latest 20250326 and Muse Spark 1.2 share?
16 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and Muse Spark 1.2 has 31.