Model comparison
Claude Fable 5 vs Qwen3.8 27B
Claude Fable 5 is the stronger model overall, scoring 66.3 to 45.3 on the Noometry Index. Qwen3.8 27B costs 18× less per token, which makes it the better buy when Claude Fable 5's lead doesn't matter for your workload.
Last verified . 28 shared benchmarks.
Alibaba (Qwen)Summary
- They share 28 benchmarks with published results for both. Claude Fable 5 scores higher in 9 categories and Qwen3.8 27B in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5 leads 88.4 to 35.7.
- The biggest single-benchmark swing is ProofBench: 95% for Claude Fable 5 and 16% for Qwen3.8 27B.
- Qwen3.8 27B is cheaper at $0.99 / $1.49 per million input/output tokens, against $10 / $50 for Claude Fable 5.
- Claude Fable 5 accepts more context: 1M tokens versus 262K.
- Qwen3.8 27B has downloadable open weights; the other is API-only.
Side by side
| Claude Fable 5 | Qwen3.8 27B | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 66.3 | 45.3 |
| Released | 2026-06-07 | 2026-08-14 |
| Weights | Proprietary | Open |
| Context window | 1M | 262K |
| Max output | 128K | 33K |
| Input $ / M tokens | $10 | $0.99 |
| Output $ / M tokens | $50 | $1.49 |
| Results tracked | 61 | 28 |
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Category by category
Coding Claude Fable 5 leads
Claude Fable 5: 67.0 (#4), Qwen3.8 27B: 50.3 (#42)
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| LMArena WebDev | 1626 | 1592 |
| SciCode | 61% | 46.6% |
| LMArena Coding | 1519 | 1487 |
| DeepSWE | 69.9% | — |
| FrontierCode | 53.5% | — |
| FrontierSWE | 47% | — |
| WeirdML | 91.9% | — |
| MirrorCode | 63.9% | — |
| ALE-Bench | 2,041 | — |
Agentic & Tool Use Not comparable
Claude Fable 5: 54.1 (#2), Qwen3.8 27B: —
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| APEX-Agents | 63.6% | — |
| Remote Labor Index | 16.1% | — |
| τ²-bench Banking | 39.7% | — |
| PostTrainBench | 41.8% | — |
| GBAEval | 74.5% | — |
| GDP.pdf | 30% | — |
| LMArena Search | 1230 | — |
| Vending-Bench 2 | 5,680 | — |
Reasoning Claude Fable 5 leads
Claude Fable 5: 76.8 (#4), Qwen3.8 27B: 31.5 (#71)
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| NYT Connections (extended) | 92.7% | 54.5% |
| CritPt | 28.6% | 5.4% |
| LMArena Hard Prompts | 1508 | 1459 |
| DTBench | 98.4% | 88% |
| LMCA | 61.1% | 41.4% |
| Surface Evolver Bench | 95% | 45% |
| Epoch Capabilities Index | 163.6 | 149.38 |
| ARC-AGI-2 | 89.2% | — |
| SimpleBench | 81.9% | — |
| Kagi LLM Benchmark | 91.4% | — |
| ARC-AGI-1 | 98.5% | — |
| Chess Puzzles | 41% | — |
| EnigmaEval | 39.3% | — |
| EBR-Bench | 39.5% | — |
| Mystery Game Puzzles | 52% | — |
| Bench to the Future 3 | 0.13 | — |
Math Claude Fable 5 leads
Claude Fable 5: 88.4 (#5), Qwen3.8 27B: 35.7 (#139)
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| ProofBench | 95% | 16% |
| LMArena Math | 1519 | 1453 |
| FrontierMath (Tiers 1-3) | 87% | — |
| FrontierMath Tier 4 | 90.2% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| FrontierMath Erdős | 0% | — |
Knowledge Claude Fable 5 leads
Claude Fable 5: 62.3 (#22), Qwen3.8 27B: 40.9 (#105)
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| LMArena Expert | 1534 | 1482 |
| GPQA Diamond | 85.9% | — |
| SimpleQA Verified | 70.7% | — |
Multimodal Claude Fable 5 leads
Claude Fable 5: 45.6 (#14), Qwen3.8 27B: 40.5 (#36)
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| LMArena Vision | 1326 | 1270 |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 35.8% | — |
| LMArena Document | 1496 | — |
Multilingual Claude Fable 5 leads
Claude Fable 5: 57.6 (#8), Qwen3.8 27B: 54.0 (#54)
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| LMArena Non-English | 1483 | 1431 |
| LMArena Chinese | 1546 | 1504 |
| LMArena French | 1509 | 1468 |
| LMArena German | 1486 | 1435 |
| LMArena Japanese | 1507 | 1392 |
| LMArena Korean | 1493 | 1389 |
| LMArena Russian | 1507 | 1421 |
| LMArena Spanish | 1503 | 1444 |
Instruction Following Claude Fable 5 leads
Claude Fable 5: 78.8 (#7), Qwen3.8 27B: 75.8 (#54)
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| LMArena Instruction Following | 1503 | 1436 |
Long Context Claude Fable 5 leads
Claude Fable 5: 46.3 (#22), Qwen3.8 27B: 44.3 (#66)
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| LMArena Longer Query | 1510 | 1448 |
Writing & Preference Claude Fable 5 leads
Claude Fable 5: 76.1 (#5), Qwen3.8 27B: 65.9 (#41)
| Benchmark | Claude Fable 5 | Qwen3.8 27B |
|---|---|---|
| LMArena Text | 1491 | 1441 |
| LMArena Creative Writing | 1494 | 1382 |
| EQ-Bench Creative Writing | 1943 | 1671 |
| LMArena Multi-Turn | 1505 | 1443 |
| EQ-Bench 4 | 1340 | — |
Frequently asked questions
Is Claude Fable 5 better than Qwen3.8 27B?
Claude Fable 5 is the stronger model overall, scoring 66.3 to 45.3 on the Noometry Index. Qwen3.8 27B costs 18× less per token, which makes it the better buy when Claude Fable 5's lead doesn't matter for your workload.
Which is cheaper, Claude Fable 5 or Qwen3.8 27B?
Qwen3.8 27B is cheaper. It lists at $0.99 per million input tokens and $1.49 per million output tokens; Claude Fable 5 lists at $10 and $50.
Is Claude Fable 5 or Qwen3.8 27B better for coding?
Claude Fable 5 scores higher on coding benchmarks: 67.0 versus 50.3 in the Noometry coding category.
Which has the bigger context window?
Claude Fable 5 does, with 1M tokens against 262K.
How many benchmarks do Claude Fable 5 and Qwen3.8 27B share?
28 benchmarks have published results for both models. Claude Fable 5 has 61 scored results on Noometry and Qwen3.8 27B has 28.