# Claude Fable 5.1 vs Yi-34B

> Claude Fable 5.1 is the stronger model overall, scoring 68.5 to 27.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-fable-5-1-vs-yi-34b
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Claude Fable 5.1 scores higher in 8 categories and Yi-34B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5.1 leads 89.5 to 19.8.
- Yi-34B has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| Provider | Anthropic | 01.AI |
| Noometry Index | 68.5 | 27.4 |
| Rank | 2 | 325 |
| Context | 1M | — |
| Input $/M | $10 | — |
| Output $/M | $50 | — |
| Weights | Proprietary | Open |

## Coding

- Claude Fable 5.1: 70.5 (#2)
- Yi-34B: 31.8 (#269)

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| LMArena Coding | 1523 | 1112 |
| 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

- Claude Fable 5.1: 50.8 (#5)
- Yi-34B: —

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| 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)
- Yi-34B: 20.3 (#222)

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| LMArena Hard Prompts | 1526 | 1104 |
| Epoch Capabilities Index | 165 | 117.28 |
| 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 | — | 71.7% |

## Math

- Claude Fable 5.1: 89.5 (#3)
- Yi-34B: 19.8 (#277)

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| LMArena Math | 1519 | 1114 |
| FrontierMath (Tiers 1-3) | 90.2% | — |
| FrontierMath Tier 4 | 87.8% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| MATH Level 5 | — | 5.1% |
| FrontierMath Erdős | 0% | — |
| GSM8K | — | 76% |

## Knowledge

- Claude Fable 5.1: 69.3 (#5)
- Yi-34B: 7.5 (#304)

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| LMArena Expert | 1528 | 1061 |
| GPQA Diamond | — | 14.7% |
| Humanity's Last Exam | 46.5% | — |
| SimpleQA Verified | 70.8% | — |
| MMLU | — | 76.3% |

## Multimodal

- Claude Fable 5.1: 54.1 (#4)
- Yi-34B: —

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| LMArena Vision | 1319 | — |
| Blueprint-Bench 2 | 41.9% | — |
| Furniture Assembly | 70% | — |
| LMArena Document | 1513 | — |

## Multilingual

- Claude Fable 5.1: 59.5 (#2)
- Yi-34B: 29.9 (#259)

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| LMArena Non-English | 1509 | 1079 |
| LMArena Chinese | 1589 | 1175 |
| LMArena French | 1532 | 1080 |
| LMArena German | 1495 | 1042 |
| LMArena Japanese | 1565 | 993 |
| LMArena Russian | 1525 | 1050 |
| LMArena Spanish | 1503 | 1070 |
| LMArena Korean | — | 959 |

## Instruction Following

- Claude Fable 5.1: 79.3 (#6)
- Yi-34B: 56.4 (#269)

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| LMArena Instruction Following | 1515 | 1091 |

## Long Context

- Claude Fable 5.1: 46.8 (#19)
- Yi-34B: 33.2 (#259)

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| LMArena Longer Query | 1524 | 1094 |

## Writing & Preference

- Claude Fable 5.1: 79.3 (#1)
- Yi-34B: 34.3 (#268)

| Benchmark | Claude Fable 5.1 | Yi-34B |
|---|---|---|
| LMArena Text | 1511 | 1129 |
| LMArena Creative Writing | 1507 | 1108 |
| LMArena Multi-Turn | 1492 | 1113 |
| EQ-Bench Creative Writing | 2162 | — |

## FAQ

### Is Claude Fable 5.1 better than Yi-34B?

Claude Fable 5.1 is the stronger model overall, scoring 68.5 to 27.4 on the Noometry Index.

### Is Claude Fable 5.1 or Yi-34B better for coding?

Claude Fable 5.1 scores higher on coding benchmarks: 70.5 versus 31.8 in the Noometry coding category.

### How many benchmarks do Claude Fable 5.1 and Yi-34B share?

17 benchmarks have published results for both models. Claude Fable 5.1 has 50 scored results on Noometry and Yi-34B has 23.