Model comparison
Claude Fable 5.1 vs Llama 13b
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 24.4 on the Noometry Index.
Last verified . 9 shared benchmarks.
MetaSummary
- They share 9 benchmarks with published results for both. Claude Fable 5.1 scores higher in 6 categories and Llama 13b in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude Fable 5.1 leads 79.2 to 13.8.
- Llama 13b has downloadable open weights; the other is API-only.
Side by side
| Claude Fable 5.1 | Llama 13b | |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 69.0 | 24.4 |
| Released | 2026-09-01 | 2023-02-24 |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $10 | — |
| Output $ / M tokens | $50 | — |
| Results tracked | 52 | 21 |
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Category by category
Coding Claude Fable 5.1 leads
Claude Fable 5.1: 74.7 (#1), Llama 13b: 21.4 (#337)
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| LMArena Coding | 1528 | 683 |
| FrontierCode | 50.9% | — |
| CursorBench | 51.8% | — |
| LMArena WebDev | 1744 | — |
| FrontierSWE | 56.3% | — |
| SciCode | 63.1% | — |
| GSO | 88.2% | — |
| WeirdML | 92.9% | — |
| MirrorCode | 73.3% | — |
| ALE-Bench | 2,143 | — |
Agentic & Tool Use Not comparable
Claude Fable 5.1: 50.7 (#5), Llama 13b: —
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| APEX-Agents | 68.6% | — |
| Remote Labor Index | 17.9% | — |
| GDP.pdf | 29.6% | — |
| Vending-Bench 2 | 5,422 | — |
Reasoning Claude Fable 5.1 leads
Claude Fable 5.1: 76.7 (#7), Llama 13b: 14.0 (#329)
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| LMArena Hard Prompts | 1526 | 728 |
| Epoch Capabilities Index | 164.7 | 100.58 |
| ARC-AGI-2 | 90% | — |
| NYT Connections (extended) | 90% | — |
| ARC-AGI-1 | 97.5% | — |
| CritPt | 31.1% | — |
| Chess Puzzles | 47% | — |
| EBR-Bench | 57.1% | — |
| Mystery Game Puzzles | 58% | — |
| DTBench | 97.6% | — |
| LMCA | 65.5% | — |
| BIG-Bench Hard | — | 37.9% |
| HellaSwag | — | 79.2% |
| LAMBADA | — | 75.2% |
| PIQA | — | 80.1% |
| WinoGrande | — | 73% |
Math Claude Fable 5.1 leads
Claude Fable 5.1: 89.6 (#4), Llama 13b: 26.7 (#256)
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| LMArena Math | 1525 | 838 |
| FrontierMath (Tiers 1-3) | 90.2% | — |
| FrontierMath Tier 4 | 87.8% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| FrontierMath Erdős | 0% | — |
| GSM8K | — | 20.6% |
Knowledge Not comparable
Claude Fable 5.1: 69.6 (#6), Llama 13b: —
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| Humanity's Last Exam | 46.5% | — |
| SimpleQA Verified | 70.8% | — |
| LMArena Expert | 1535 | — |
| ARC (AI2) Challenge | — | 52.7% |
| BoolQ | — | 78.7% |
| MMLU | — | 47.7% |
| OpenBookQA | — | 56.4% |
| TriviaQA | — | 77.9% |
Multimodal Not comparable
Claude Fable 5.1: 53.9 (#4), Llama 13b: —
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| LMArena Vision | 1318 | — |
| Blueprint-Bench 2 | 41.9% | — |
| Furniture Assembly | 70% | — |
| LMArena Document | 1513 | — |
| ScienceQA | — | 43.3% |
Multilingual Claude Fable 5.1 leads
Claude Fable 5.1: 59.1 (#3), Llama 13b: 16.6 (#297)
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| LMArena Non-English | 1507 | 819 |
| LMArena Chinese | 1586 | — |
| LMArena French | 1525 | — |
| LMArena German | 1500 | — |
| LMArena Japanese | 1543 | — |
| LMArena Korean | 1534 | — |
| LMArena Russian | 1521 | — |
| LMArena Spanish | 1516 | — |
Instruction Following Claude Fable 5.1 leads
Claude Fable 5.1: 79.2 (#6), Llama 13b: 36.7 (#305)
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| LMArena Instruction Following | 1517 | 781 |
Long Context Not comparable
Claude Fable 5.1: 46.7 (#20), Llama 13b: —
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| LMArena Longer Query | 1522 | — |
Writing & Preference Claude Fable 5.1 leads
Claude Fable 5.1: 79.2 (#2), Llama 13b: 13.8 (#312)
| Benchmark | Claude Fable 5.1 | Llama 13b |
|---|---|---|
| LMArena Text | 1510 | 834 |
| LMArena Creative Writing | 1507 | 794 |
| LMArena Multi-Turn | 1492 | 753 |
| EQ-Bench Creative Writing | 2162 | — |
Frequently asked questions
Is Claude Fable 5.1 better than Llama 13b?
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 24.4 on the Noometry Index.
Is Claude Fable 5.1 or Llama 13b better for coding?
Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 21.4 in the Noometry coding category.
How many benchmarks do Claude Fable 5.1 and Llama 13b share?
9 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Llama 13b has 21.