Model comparison
Claude Fable 5.1 vs Qwen2.5 14B Instruct
Claude Fable 5.1 has enough public results to be ranked (#2); Qwen2.5 14B Instruct does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
Alibaba (Qwen)Summary
- The widest gap is in coding, where Claude Fable 5.1 leads 74.7 to 37.7.
- Qwen2.5 14B Instruct is cheaper at $0.35 / $1.40 per million input/output tokens, against $10 / $50 for Claude Fable 5.1.
- Claude Fable 5.1 accepts more context: 1M tokens versus 131K.
- Qwen2.5 14B Instruct has downloadable open weights; the other is API-only.
Side by side
| Claude Fable 5.1 | Qwen2.5 14B Instruct | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 69.0 | 38.7 |
| Released | 2026-09-01 | 2024-09 |
| Weights | Proprietary | Open |
| Context window | 1M | 131K |
| Max output | 128K | 8K |
| Input $ / M tokens | $10 | $0.35 |
| Output $ / M tokens | $50 | $1.40 |
| Results tracked | 52 | 3 |
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Category by category
Coding Claude Fable 5.1 leads
Claude Fable 5.1: 74.7 (#1), Qwen2.5 14B Instruct: 37.7 (#191)
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| FrontierCode | 50.9% | — |
| CursorBench | 51.8% | — |
| LMArena WebDev | 1744 | — |
| FrontierSWE | 56.3% | — |
| SciCode | 63.1% | — |
| GSO | 88.2% | — |
| WeirdML | 92.9% | — |
| BigCodeBench Instruct | — | 39.8% |
| LMArena Coding | 1528 | — |
| MirrorCode | 73.3% | — |
| BigCodeBench Complete | — | 52.2% |
| ALE-Bench | 2,143 | — |
Agentic & Tool Use Not comparable
Claude Fable 5.1: 50.7 (#5), Qwen2.5 14B Instruct: —
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| APEX-Agents | 68.6% | — |
| Remote Labor Index | 17.9% | — |
| GDP.pdf | 29.6% | — |
| Vending-Bench 2 | 5,422 | — |
Reasoning Not comparable
Claude Fable 5.1: 76.7 (#7), Qwen2.5 14B Instruct: —
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| ARC-AGI-2 | 90% | — |
| NYT Connections (extended) | 90% | — |
| ARC-AGI-1 | 97.5% | — |
| CritPt | 31.1% | — |
| Chess Puzzles | 47% | — |
| EBR-Bench | 57.1% | — |
| LMArena Hard Prompts | 1526 | — |
| Mystery Game Puzzles | 58% | — |
| DTBench | 97.6% | — |
| LMCA | 65.5% | — |
| Epoch Capabilities Index | 164.7 | — |
Math Not comparable
Claude Fable 5.1: 89.6 (#4), Qwen2.5 14B Instruct: —
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| FrontierMath (Tiers 1-3) | 90.2% | — |
| FrontierMath Tier 4 | 87.8% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| LMArena Math | 1525 | — |
| FrontierMath Erdős | 0% | — |
Knowledge Not comparable
Claude Fable 5.1: 69.6 (#6), Qwen2.5 14B Instruct: —
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| Humanity's Last Exam | 46.5% | — |
| SimpleQA Verified | 70.8% | — |
| LMArena Expert | 1535 | — |
| MMLU | — | 79.9% |
Multimodal Not comparable
Claude Fable 5.1: 53.9 (#4), Qwen2.5 14B Instruct: —
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| LMArena Vision | 1318 | — |
| Blueprint-Bench 2 | 41.9% | — |
| Furniture Assembly | 70% | — |
| LMArena Document | 1513 | — |
Multilingual Not comparable
Claude Fable 5.1: 59.1 (#3), Qwen2.5 14B Instruct: —
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| LMArena Non-English | 1507 | — |
| LMArena Chinese | 1586 | — |
| LMArena French | 1525 | — |
| LMArena German | 1500 | — |
| LMArena Japanese | 1543 | — |
| LMArena Korean | 1534 | — |
| LMArena Russian | 1521 | — |
| LMArena Spanish | 1516 | — |
Instruction Following Not comparable
Claude Fable 5.1: 79.2 (#6), Qwen2.5 14B Instruct: —
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| LMArena Instruction Following | 1517 | — |
Long Context Not comparable
Claude Fable 5.1: 46.7 (#20), Qwen2.5 14B Instruct: —
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| LMArena Longer Query | 1522 | — |
Writing & Preference Not comparable
Claude Fable 5.1: 79.2 (#2), Qwen2.5 14B Instruct: —
| Benchmark | Claude Fable 5.1 | Qwen2.5 14B Instruct |
|---|---|---|
| LMArena Text | 1510 | — |
| LMArena Creative Writing | 1507 | — |
| EQ-Bench Creative Writing | 2162 | — |
| LMArena Multi-Turn | 1492 | — |
Frequently asked questions
Is Claude Fable 5.1 better than Qwen2.5 14B Instruct?
Claude Fable 5.1 has enough public results to be ranked (#2); Qwen2.5 14B Instruct does not yet, so treat this comparison as directional.
Which is cheaper, Claude Fable 5.1 or Qwen2.5 14B Instruct?
Qwen2.5 14B Instruct is cheaper. It lists at $0.35 per million input tokens and $1.40 per million output tokens; Claude Fable 5.1 lists at $10 and $50.
Is Claude Fable 5.1 or Qwen2.5 14B Instruct better for coding?
Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 37.7 in the Noometry coding category.
Which has the bigger context window?
Claude Fable 5.1 does, with 1M tokens against 131K.
How many benchmarks do Claude Fable 5.1 and Qwen2.5 14B Instruct share?
0 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Qwen2.5 14B Instruct has 3.