# Claude 2.1 vs Yi-34B

> Yi-34B is the stronger model overall, scoring 27.8 to 25.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-yi-34b
- Last updated: 2026-10-11
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. Claude 2.1 scores higher in 2 categories and Yi-34B in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Yi-34B leads 21.6 to 10.2.
- The biggest single-benchmark swing is GPQA Diamond: 33% for Claude 2.1 and 14.7% for Yi-34B.
- Yi-34B has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 2.1 | Yi-34B |
|---|---|---|
| Provider | Anthropic | 01.AI |
| Noometry Index | 25.2 | 27.8 |
| Rank | 345 | 329 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Claude 2.1: 26.2 (#327)
- Yi-34B: 32.3 (#274)

| Benchmark | Claude 2.1 | Yi-34B |
|---|---|---|
| WeirdML | 7.1% | — |
| LMArena Coding | — | 1112 |

## Reasoning

- Claude 2.1: 21.4 (#221)
- Yi-34B: 21.2 (#226)

| Benchmark | Claude 2.1 | Yi-34B |
|---|---|---|
| Epoch Capabilities Index | 119.27 | 117.39 |
| LMArena Hard Prompts | — | 1104 |
| DTBench | 51% | — |
| BIG-Bench Hard | — | 71.7% |
| ForecastBench | 54.2 | — |

## Math

- Claude 2.1: 10.2 (#315)
- Yi-34B: 21.6 (#282)

| Benchmark | Claude 2.1 | Yi-34B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | — |
| LMArena Math | — | 1114 |
| MATH Level 5 | — | 5.1% |
| GSM8K | — | 76% |

## Knowledge

- Claude 2.1: 15.4 (#292)
- Yi-34B: 7.5 (#309)

| Benchmark | Claude 2.1 | Yi-34B |
|---|---|---|
| GPQA Diamond | 33% | 14.7% |
| MMLU | 73.5% | 76.3% |
| LMArena Expert | — | 1061 |

## Multilingual

- Claude 2.1: —
- Yi-34B: 29.7 (#264)

| Benchmark | Claude 2.1 | Yi-34B |
|---|---|---|
| LMArena Non-English | — | 1079 |
| LMArena Chinese | — | 1176 |
| LMArena French | — | 1081 |
| LMArena German | — | 1042 |
| LMArena Japanese | — | 993 |
| LMArena Korean | — | 959 |
| LMArena Russian | — | 1050 |
| LMArena Spanish | — | 1070 |

## Instruction Following

- Claude 2.1: —
- Yi-34B: 56.2 (#274)

| Benchmark | Claude 2.1 | Yi-34B |
|---|---|---|
| LMArena Instruction Following | — | 1091 |

## Long Context

- Claude 2.1: —
- Yi-34B: 33.2 (#264)

| Benchmark | Claude 2.1 | Yi-34B |
|---|---|---|
| LMArena Longer Query | — | 1094 |

## Writing & Preference

- Claude 2.1: —
- Yi-34B: 34.1 (#273)

| Benchmark | Claude 2.1 | Yi-34B |
|---|---|---|
| LMArena Text | — | 1129 |
| LMArena Creative Writing | — | 1108 |
| LMArena Multi-Turn | — | 1113 |

## FAQ

### Is Claude 2.1 better than Yi-34B?

Yi-34B is the stronger model overall, scoring 27.8 to 25.2 on the Noometry Index.

### Is Claude 2.1 or Yi-34B better for coding?

Yi-34B scores higher on coding benchmarks: 32.3 versus 26.2 in the Noometry coding category.

### How many benchmarks do Claude 2.1 and Yi-34B share?

3 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Yi-34B has 23.