Model comparison
Claude Fable 5.1 vs Llama 2-13B
Claude Fable 5.1 is the stronger model overall, scoring 68.5 to 29.1 on the Noometry Index.
Last verified . 19 shared benchmarks.
MetaSummary
- They share 19 benchmarks with published results for both. Claude Fable 5.1 scores higher in 8 categories and Llama 2-13B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Fable 5.1 leads 76.7 to 12.3.
- The biggest single-benchmark swing is DTBench: 97.6% for Claude Fable 5.1 and 42.2% for Llama 2-13B.
- Llama 2-13B has downloadable open weights; the other is API-only.
Side by side
| Claude Fable 5.1 | Llama 2-13B | |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 68.5 | 29.1 |
| Released | 2026-09-01 | 2023-07-18 |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $10 | — |
| Output $ / M tokens | $50 | — |
| Results tracked | 50 | 32 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Claude Fable 5.1 leads
Claude Fable 5.1: 70.5 (#2), Llama 2-13B: 30.4 (#287)
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| LMArena Coding | 1523 | 1062 |
| FrontierCode | 50.9% | — |
| CursorBench | 51.8% | — |
| LMArena WebDev | 1753 | — |
| FrontierSWE | 56.3% | — |
| SciCode | 63.1% | — |
| WeirdML | 92.9% | — |
| MirrorCode | 73.3% | — |
| ALE-Bench | 2,143 | — |
Agentic & Tool Use Not comparable
Claude Fable 5.1: 50.8 (#5), Llama 2-13B: —
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| 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 (#5), Llama 2-13B: 12.3 (#333)
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| Chess Puzzles | 47% | 0% |
| LMArena Hard Prompts | 1526 | 1051 |
| DTBench | 97.6% | 42.2% |
| Epoch Capabilities Index | 165 | 105.8 |
| ARC-AGI-2 | 90% | — |
| NYT Connections (extended) | 90% | — |
| ARC-AGI-1 | 97.5% | — |
| CritPt | 31.1% | — |
| EBR-Bench | 57.1% | — |
| Mystery Game Puzzles | 58% | — |
| LMCA | 65.5% | — |
| BIG-Bench Hard | — | 58.2% |
| HellaSwag | — | 80.7% |
| LAMBADA | — | 76.5% |
| PIQA | — | 80.8% |
| WinoGrande | — | 72.8% |
Math Claude Fable 5.1 leads
Claude Fable 5.1: 89.5 (#3), Llama 2-13B: 28.7 (#226)
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| LMArena Math | 1519 | 1065 |
| FrontierMath (Tiers 1-3) | 90.2% | — |
| FrontierMath Tier 4 | 87.8% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| FrontierMath Erdős | 0% | — |
| GSM8K | — | 36.9% |
Knowledge Claude Fable 5.1 leads
Claude Fable 5.1: 69.3 (#5), Llama 2-13B: 27.5 (#244)
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| LMArena Expert | 1528 | 1030 |
| Humanity's Last Exam | 46.5% | — |
| SimpleQA Verified | 70.8% | — |
| ARC (AI2) Challenge | — | 60.3% |
| BoolQ | — | 82.4% |
| MMLU | — | 55.6% |
| OpenBookQA | — | 57% |
| TriviaQA | — | 79.6% |
Multimodal Not comparable
Claude Fable 5.1: 54.1 (#4), Llama 2-13B: —
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| LMArena Vision | 1319 | — |
| Blueprint-Bench 2 | 41.9% | — |
| Furniture Assembly | 70% | — |
| LMArena Document | 1513 | — |
| ScienceQA | — | 55.8% |
Multilingual Claude Fable 5.1 leads
Claude Fable 5.1: 59.5 (#2), Llama 2-13B: 26.7 (#274)
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| LMArena Non-English | 1509 | 1024 |
| LMArena Chinese | 1589 | 1001 |
| LMArena French | 1532 | 1043 |
| LMArena German | 1495 | 1009 |
| LMArena Japanese | 1565 | 894 |
| LMArena Russian | 1525 | 1055 |
| LMArena Spanish | 1503 | 1086 |
| LMArena Korean | — | 953 |
Instruction Following Claude Fable 5.1 leads
Claude Fable 5.1: 79.3 (#6), Llama 2-13B: 53.5 (#282)
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| LMArena Instruction Following | 1515 | 1046 |
Long Context Claude Fable 5.1 leads
Claude Fable 5.1: 46.8 (#19), Llama 2-13B: 32.3 (#264)
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| LMArena Longer Query | 1524 | 1064 |
Writing & Preference Claude Fable 5.1 leads
Claude Fable 5.1: 79.3 (#1), Llama 2-13B: 30.0 (#284)
| Benchmark | Claude Fable 5.1 | Llama 2-13B |
|---|---|---|
| LMArena Text | 1511 | 1085 |
| LMArena Creative Writing | 1507 | 1047 |
| LMArena Multi-Turn | 1492 | 1050 |
| EQ-Bench Creative Writing | 2162 | — |
Frequently asked questions
Is Claude Fable 5.1 better than Llama 2-13B?
Claude Fable 5.1 is the stronger model overall, scoring 68.5 to 29.1 on the Noometry Index.
Is Claude Fable 5.1 or Llama 2-13B better for coding?
Claude Fable 5.1 scores higher on coding benchmarks: 70.5 versus 30.4 in the Noometry coding category.
How many benchmarks do Claude Fable 5.1 and Llama 2-13B share?
19 benchmarks have published results for both models. Claude Fable 5.1 has 50 scored results on Noometry and Llama 2-13B has 32.