Model comparison
Claude Mythos Preview vs Qwen3.8 27B
Qwen3.8 27B has enough public results to be ranked (#68); Claude Mythos Preview does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
Alibaba (Qwen)Summary
- The widest gap is in agentic & tool use, where Claude Mythos Preview leads 41.4 to 32.9.
- Qwen3.8 27B has downloadable open weights; the other is API-only.
Side by side
| Claude Mythos Preview | Qwen3.8 27B | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 41.2 | 46.0 |
| Released | 2026-04-07 | 2026-08-14 |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 33K |
| Input $ / M tokens | — | $0.04 |
| Output $ / M tokens | — | $2.30 |
| Results tracked | 2 | 31 |
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Category by category
Coding Not comparable
Claude Mythos Preview: —, Qwen3.8 27B: 50.5 (#44)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| LMArena WebDev | — | 1593 |
| SciCode | — | 46.6% |
| LMArena Coding | — | 1482 |
Agentic & Tool Use Claude Mythos Preview leads
Claude Mythos Preview: 41.4, Qwen3.8 27B: 32.9 (#57)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| APEX-Agents | — | 47.5% |
| ExploitBench | 73.8% | — |
| METR Time Horizons | 85.2% | — |
Reasoning Not comparable
Claude Mythos Preview: —, Qwen3.8 27B: 41.0 (#54)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| ARC-AGI-2 | — | 42.4% |
| NYT Connections (extended) | — | 54.5% |
| ARC-AGI-1 | — | 87.5% |
| CritPt | — | 5.4% |
| LMArena Hard Prompts | — | 1460 |
| DTBench | — | 88% |
| LMCA | — | 41.4% |
| Surface Evolver Bench | — | 45% |
| Epoch Capabilities Index | — | 149.38 |
Math Not comparable
Claude Mythos Preview: —, Qwen3.8 27B: 37.1 (#161)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| ProofBench | — | 16% |
| LMArena Math | — | 1456 |
Knowledge Not comparable
Claude Mythos Preview: —, Qwen3.8 27B: 41.6 (#109)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| LMArena Expert | — | 1482 |
Multimodal Not comparable
Claude Mythos Preview: —, Qwen3.8 27B: 41.3 (#37)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| LMArena Vision | — | 1271 |
Multilingual Not comparable
Claude Mythos Preview: —, Qwen3.8 27B: 53.7 (#60)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| LMArena Non-English | — | 1430 |
| LMArena Chinese | — | 1504 |
| LMArena French | — | 1465 |
| LMArena German | — | 1438 |
| LMArena Japanese | — | 1384 |
| LMArena Korean | — | 1393 |
| LMArena Russian | — | 1415 |
| LMArena Spanish | — | 1448 |
Instruction Following Not comparable
Claude Mythos Preview: —, Qwen3.8 27B: 75.8 (#53)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| LMArena Instruction Following | — | 1439 |
Long Context Not comparable
Claude Mythos Preview: —, Qwen3.8 27B: 44.3 (#70)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| LMArena Longer Query | — | 1450 |
Writing & Preference Not comparable
Claude Mythos Preview: —, Qwen3.8 27B: 65.8 (#43)
| Benchmark | Claude Mythos Preview | Qwen3.8 27B |
|---|---|---|
| LMArena Text | — | 1441 |
| LMArena Creative Writing | — | 1384 |
| EQ-Bench Creative Writing | — | 1671 |
| LMArena Multi-Turn | — | 1441 |
Frequently asked questions
Is Claude Mythos Preview better than Qwen3.8 27B?
Qwen3.8 27B has enough public results to be ranked (#68); Claude Mythos Preview does not yet, so treat this comparison as directional.
How many benchmarks do Claude Mythos Preview and Qwen3.8 27B share?
0 benchmarks have published results for both models. Claude Mythos Preview has 2 scored results on Noometry and Qwen3.8 27B has 31.