Model comparison
Claude Fable 5.1 vs Gemma 2B
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 29.6 on the Noometry Index.
Last verified . 12 shared benchmarks.
GoogleSummary
- They share 12 benchmarks with published results for both. Claude Fable 5.1 scores higher in 7 categories and Gemma 2B in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5.1 leads 89.6 to 30.0.
- Gemma 2B has downloadable open weights; the other is API-only.
Side by side
| Claude Fable 5.1 | Gemma 2B | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 69.0 | 29.6 |
| Released | 2026-09-01 | 2024-02-21 |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $10 | — |
| Output $ / M tokens | $50 | — |
| Results tracked | 52 | 23 |
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Category by category
Coding Claude Fable 5.1 leads
Claude Fable 5.1: 74.7 (#1), Gemma 2B: 29.4 (#305)
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Coding | 1528 | 1010 |
| 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 | — |
| HumanEval+ | — | 20.7% |
| MBPP+ | — | 34.1% |
Agentic & Tool Use Not comparable
Claude Fable 5.1: 50.7 (#5), Gemma 2B: —
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| 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), Gemma 2B: 18.8 (#275)
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Hard Prompts | 1526 | 989 |
| Epoch Capabilities Index | 164.7 | 94.2 |
| 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 | — | 35.2% |
| HellaSwag | — | 71.4% |
| PIQA | — | 77.3% |
| WinoGrande | — | 65.4% |
Math Claude Fable 5.1 leads
Claude Fable 5.1: 89.6 (#4), Gemma 2B: 30.0 (#239)
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Math | 1525 | 1009 |
| FrontierMath (Tiers 1-3) | 90.2% | — |
| FrontierMath Tier 4 | 87.8% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| FrontierMath Erdős | 0% | — |
| GSM8K | — | 17.7% |
Knowledge Not comparable
Claude Fable 5.1: 69.6 (#6), Gemma 2B: —
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| Humanity's Last Exam | 46.5% | — |
| SimpleQA Verified | 70.8% | — |
| LMArena Expert | 1535 | — |
| ARC (AI2) Challenge | — | 42.1% |
| BoolQ | — | 69.4% |
| MMLU | — | 42.3% |
| TriviaQA | — | 53.2% |
Multimodal Not comparable
Claude Fable 5.1: 53.9 (#4), Gemma 2B: —
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Vision | 1318 | — |
| Blueprint-Bench 2 | 41.9% | — |
| Furniture Assembly | 70% | — |
| LMArena Document | 1513 | — |
Multilingual Claude Fable 5.1 leads
Claude Fable 5.1: 59.1 (#3), Gemma 2B: 23.0 (#294)
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Non-English | 1507 | 958 |
| LMArena Chinese | 1586 | 986 |
| LMArena Russian | 1521 | 937 |
| LMArena French | 1525 | — |
| LMArena German | 1500 | — |
| LMArena Japanese | 1543 | — |
| LMArena Korean | 1534 | — |
| LMArena Spanish | 1516 | — |
Instruction Following Claude Fable 5.1 leads
Claude Fable 5.1: 79.2 (#6), Gemma 2B: 48.5 (#302)
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Instruction Following | 1517 | 970 |
Long Context Claude Fable 5.1 leads
Claude Fable 5.1: 46.7 (#20), Gemma 2B: 29.9 (#291)
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Longer Query | 1522 | 981 |
Writing & Preference Claude Fable 5.1 leads
Claude Fable 5.1: 79.2 (#2), Gemma 2B: 24.0 (#308)
| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Text | 1510 | 1002 |
| LMArena Creative Writing | 1507 | 987 |
| LMArena Multi-Turn | 1492 | 945 |
| EQ-Bench Creative Writing | 2162 | — |
Frequently asked questions
Is Claude Fable 5.1 better than Gemma 2B?
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 29.6 on the Noometry Index.
Is Claude Fable 5.1 or Gemma 2B better for coding?
Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 29.4 in the Noometry coding category.
How many benchmarks do Claude Fable 5.1 and Gemma 2B share?
12 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Gemma 2B has 23.