Model comparison
Claude Mythos Preview vs Muse Spark 1.3
Muse Spark 1.3 has enough public results to be ranked (#27); Claude Mythos Preview does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
MetaSide by side
| Claude Mythos Preview | Muse Spark 1.3 | |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 40.8 | 54.4 |
| Released | 2026-04-07 | 2026-09-02 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 131K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $4.25 |
| Results tracked | 2 | 34 |
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Category by category
Coding Not comparable
Claude Mythos Preview: —, Muse Spark 1.3: 56.1 (#18)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| CursorBench | — | 41.6% |
| LMArena WebDev | — | 1655 |
| SciCode | — | 59.7% |
| LMArena Coding | — | 1516 |
Agentic & Tool Use Claude Mythos Preview leads
Claude Mythos Preview: 41.1, Muse Spark 1.3: 38.6 (#28)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| APEX-Agents | — | 57.8% |
| ExploitBench | 73.8% | — |
| GDP.pdf | — | 27.6% |
| METR Time Horizons | 85.2% | — |
Reasoning Not comparable
Claude Mythos Preview: —, Muse Spark 1.3: 52.9 (#27)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| NYT Connections (extended) | — | 85.1% |
| CritPt | — | 24.9% |
| Chess Puzzles | — | 38% |
| LMArena Hard Prompts | — | 1503 |
| Mystery Game Puzzles | — | 25% |
| DTBench | — | 96.5% |
| LMCA | — | 53.9% |
| Bench to the Future 3 | — | 0.14 |
| Epoch Capabilities Index | — | 156.89 |
Math Not comparable
Claude Mythos Preview: —, Muse Spark 1.3: 72.4 (#16)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 74.4% |
| FrontierMath Tier 4 | — | 46.3% |
| OTIS Mock AIME 2024-2025 | — | 99.2% |
| LMArena Math | — | 1497 |
Knowledge Not comparable
Claude Mythos Preview: —, Muse Spark 1.3: 42.0 (#92)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| LMArena Expert | — | 1516 |
Multimodal Not comparable
Claude Mythos Preview: —, Muse Spark 1.3: 43.0 (#21)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| LMArena Vision | — | 1310 |
| LMArena Document | — | 1471 |
Multilingual Not comparable
Claude Mythos Preview: —, Muse Spark 1.3: 57.8 (#6)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| LMArena Non-English | — | 1485 |
| LMArena Chinese | — | 1527 |
| LMArena French | — | 1534 |
| LMArena Korean | — | 1513 |
| LMArena Russian | — | 1491 |
| LMArena Spanish | — | 1485 |
Instruction Following Not comparable
Claude Mythos Preview: —, Muse Spark 1.3: 77.8 (#14)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| LMArena Instruction Following | — | 1481 |
Long Context Not comparable
Claude Mythos Preview: —, Muse Spark 1.3: 45.7 (#29)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| LMArena Longer Query | — | 1491 |
Writing & Preference Not comparable
Claude Mythos Preview: —, Muse Spark 1.3: 73.7 (#10)
| Benchmark | Claude Mythos Preview | Muse Spark 1.3 |
|---|---|---|
| LMArena Text | — | 1490 |
| LMArena Creative Writing | — | 1450 |
| EQ-Bench Creative Writing | — | 1906 |
| LMArena Multi-Turn | — | 1486 |
Frequently asked questions
Is Claude Mythos Preview better than Muse Spark 1.3?
Muse Spark 1.3 has enough public results to be ranked (#27); Claude Mythos Preview does not yet, so treat this comparison as directional.
How many benchmarks do Claude Mythos Preview and Muse Spark 1.3 share?
0 benchmarks have published results for both models. Claude Mythos Preview has 2 scored results on Noometry and Muse Spark 1.3 has 34.