Model comparison
Claude Fable 5 vs Qwen2.5 7B Instruct
Claude Fable 5 is the stronger model overall, scoring 66.3 to 28.6 on the Noometry Index. Qwen2.5 7B Instruct costs 65× less per token, which makes it the better buy when Claude Fable 5's lead doesn't matter for your workload.
Last verified . 6 shared benchmarks.
Alibaba (Qwen)Summary
- They share 6 benchmarks with published results for both. Claude Fable 5 scores higher in 7 categories and Qwen2.5 7B Instruct in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5 leads 88.4 to 11.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Fable 5 and 2.5% for Qwen2.5 7B Instruct.
- Qwen2.5 7B Instruct is cheaper at $0.17 / $0.70 per million input/output tokens, against $10 / $50 for Claude Fable 5.
- Claude Fable 5 accepts more context: 1M tokens versus 131K.
- Qwen2.5 7B Instruct has downloadable open weights; the other is API-only.
Side by side
| Claude Fable 5 | Qwen2.5 7B Instruct | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 66.3 | 28.6 |
| Released | 2026-06-07 | 2024-09 |
| Weights | Proprietary | Open |
| Context window | 1M | 131K |
| Max output | 128K | 8K |
| Input $ / M tokens | $10 | $0.17 |
| Output $ / M tokens | $50 | $0.70 |
| Results tracked | 61 | 15 |
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Category by category
Coding Claude Fable 5 leads
Claude Fable 5: 67.0 (#4), Qwen2.5 7B Instruct: 35.9 (#204)
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| DeepSWE | 69.9% | — |
| FrontierCode | 53.5% | — |
| LMArena WebDev | 1626 | — |
| FrontierSWE | 47% | — |
| SciCode | 61% | — |
| WeirdML | 91.9% | — |
| BigCodeBench Instruct | — | 37.6% |
| LMArena Coding | 1519 | — |
| MirrorCode | 63.9% | — |
| BigCodeBench Complete | — | 46.1% |
| ALE-Bench | 2,041 | — |
Agentic & Tool Use Claude Fable 5 leads
Claude Fable 5: 54.1 (#2), Qwen2.5 7B Instruct: 23.5 (#117)
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| APEX-Agents | 63.6% | — |
| Remote Labor Index | 16.1% | — |
| τ²-bench Banking | 39.7% | — |
| PostTrainBench | 41.8% | — |
| BALROG | — | 7.8% |
| 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), Qwen2.5 7B Instruct: 14.3 (#317)
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| Chess Puzzles | 41% | 0% |
| DTBench | 98.4% | 47.7% |
| LMCA | 61.1% | 6.4% |
| Epoch Capabilities Index | 163.6 | 118.44 |
| ARC-AGI-2 | 89.2% | — |
| SimpleBench | 81.9% | — |
| Kagi LLM Benchmark | 91.4% | — |
| NYT Connections (extended) | 92.7% | — |
| ARC-AGI-1 | 98.5% | — |
| CritPt | 28.6% | — |
| EnigmaEval | 39.3% | — |
| EBR-Bench | 39.5% | — |
| LMArena Hard Prompts | 1508 | — |
| Mystery Game Puzzles | 52% | — |
| Surface Evolver Bench | 95% | — |
| Bench to the Future 3 | 0.13 | — |
Math Claude Fable 5 leads
Claude Fable 5: 88.4 (#5), Qwen2.5 7B Instruct: 11.8 (#300)
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 2.5% |
| FrontierMath (Tiers 1-3) | 87% | — |
| FrontierMath Tier 4 | 90.2% | — |
| ProofBench | 95% | — |
| Omni-MATH | — | 29.4% |
| LMArena Math | 1519 | — |
| FrontierMath Erdős | 0% | — |
Knowledge Claude Fable 5 leads
Claude Fable 5: 62.3 (#22), Qwen2.5 7B Instruct: 17.0 (#281)
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| GPQA Diamond | 85.9% | 35.5% |
| SimpleQA Verified | 70.7% | — |
| MMLU-Pro | — | 53.9% |
| GPQA (HELM) | — | 34.1% |
| LMArena Expert | 1534 | — |
| MMLU | — | 72.9% |
Multimodal Not comparable
Claude Fable 5: 45.6 (#14), Qwen2.5 7B Instruct: —
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| LMArena Vision | 1326 | — |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 35.8% | — |
| LMArena Document | 1496 | — |
Multilingual Not comparable
Claude Fable 5: 57.6 (#8), Qwen2.5 7B Instruct: —
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| LMArena Non-English | 1483 | — |
| LMArena Chinese | 1546 | — |
| LMArena French | 1509 | — |
| LMArena German | 1486 | — |
| LMArena Japanese | 1507 | — |
| LMArena Korean | 1493 | — |
| LMArena Russian | 1507 | — |
| LMArena Spanish | 1503 | — |
Instruction Following Claude Fable 5 leads
Claude Fable 5: 78.8 (#7), Qwen2.5 7B Instruct: 63.4 (#226)
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| IFEval | — | 74.1% |
| LMArena Instruction Following | 1503 | — |
Long Context Not comparable
Claude Fable 5: 46.3 (#22), Qwen2.5 7B Instruct: —
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| LMArena Longer Query | 1510 | — |
Writing & Preference Claude Fable 5 leads
Claude Fable 5: 76.1 (#5), Qwen2.5 7B Instruct: 48.8 (#194)
| Benchmark | Claude Fable 5 | Qwen2.5 7B Instruct |
|---|---|---|
| LMArena Text | 1491 | — |
| LMArena Creative Writing | 1494 | — |
| EQ-Bench Creative Writing | 1943 | — |
| WildBench | — | 73.1% |
| EQ-Bench 4 | 1340 | — |
| LMArena Multi-Turn | 1505 | — |
Frequently asked questions
Is Claude Fable 5 better than Qwen2.5 7B Instruct?
Claude Fable 5 is the stronger model overall, scoring 66.3 to 28.6 on the Noometry Index. Qwen2.5 7B Instruct costs 65× 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 Qwen2.5 7B Instruct?
Qwen2.5 7B Instruct is cheaper. It lists at $0.17 per million input tokens and $0.70 per million output tokens; Claude Fable 5 lists at $10 and $50.
Is Claude Fable 5 or Qwen2.5 7B Instruct better for coding?
Claude Fable 5 scores higher on coding benchmarks: 67.0 versus 35.9 in the Noometry coding category.
Which has the bigger context window?
Claude Fable 5 does, with 1M tokens against 131K.
How many benchmarks do Claude Fable 5 and Qwen2.5 7B Instruct share?
6 benchmarks have published results for both models. Claude Fable 5 has 61 scored results on Noometry and Qwen2.5 7B Instruct has 15.