# Claude Fable 5.1 vs Gemma 2B

> Claude Fable 5.1 is the stronger model overall, scoring 68.5 to 29.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-fable-5-1-vs-gemma-2b
- Last updated: 2026-10-10
- Shared benchmarks: 12

## Summary

- 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 89.5 to 27.6.
- Gemma 2B has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 68.5 | 29.1 |
| Rank | 2 | 305 |
| Context | 1M | — |
| Input $/M | $10 | — |
| Output $/M | $50 | — |
| Weights | Proprietary | Open |

## Coding

- Claude Fable 5.1: 70.5 (#2)
- Gemma 2B: 28.9 (#300)

| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Coding | 1523 | 1010 |
| 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 | — |
| HumanEval+ | — | 20.7% |
| MBPP+ | — | 34.1% |

## Agentic & Tool Use

- Claude Fable 5.1: 50.8 (#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: 76.7 (#5)
- Gemma 2B: 17.9 (#275)

| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Hard Prompts | 1526 | 989 |
| Epoch Capabilities Index | 165 | 93.57 |
| 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: 89.5 (#3)
- Gemma 2B: 27.6 (#237)

| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Math | 1519 | 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

- Claude Fable 5.1: 69.3 (#5)
- Gemma 2B: —

| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| Humanity's Last Exam | 46.5% | — |
| SimpleQA Verified | 70.8% | — |
| LMArena Expert | 1528 | — |
| ARC (AI2) Challenge | — | 42.1% |
| BoolQ | — | 69.4% |
| MMLU | — | 42.3% |
| TriviaQA | — | 53.2% |

## Multimodal

- Claude Fable 5.1: 54.1 (#4)
- Gemma 2B: —

| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Vision | 1319 | — |
| Blueprint-Bench 2 | 41.9% | — |
| Furniture Assembly | 70% | — |
| LMArena Document | 1513 | — |

## Multilingual

- Claude Fable 5.1: 59.5 (#2)
- Gemma 2B: 23.1 (#289)

| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Non-English | 1509 | 958 |
| LMArena Chinese | 1589 | 986 |
| LMArena Russian | 1525 | 937 |
| LMArena French | 1532 | — |
| LMArena German | 1495 | — |
| LMArena Japanese | 1565 | — |
| LMArena Spanish | 1503 | — |

## Instruction Following

- Claude Fable 5.1: 79.3 (#6)
- Gemma 2B: 48.8 (#297)

| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Instruction Following | 1515 | 971 |

## Long Context

- Claude Fable 5.1: 46.8 (#19)
- Gemma 2B: 29.9 (#286)

| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Longer Query | 1524 | 981 |

## Writing & Preference

- Claude Fable 5.1: 79.3 (#1)
- Gemma 2B: 24.1 (#303)

| Benchmark | Claude Fable 5.1 | Gemma 2B |
|---|---|---|
| LMArena Text | 1511 | 1002 |
| LMArena Creative Writing | 1507 | 986 |
| LMArena Multi-Turn | 1492 | 945 |
| EQ-Bench Creative Writing | 2162 | — |

## FAQ

### Is Claude Fable 5.1 better than Gemma 2B?

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 Gemma 2B better for coding?

Claude Fable 5.1 scores higher on coding benchmarks: 70.5 versus 28.9 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 50 scored results on Noometry and Gemma 2B has 23.