# Claude Opus 4.1 vs Yi-34B

> Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 27.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-1-vs-yi-34b
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Claude Opus 4.1 scores higher in 8 categories and Yi-34B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4.1 leads 41.9 to 7.5.
- The biggest single-benchmark swing is GPQA Diamond: 77.3% for Claude Opus 4.1 and 14.7% for Yi-34B.
- Yi-34B has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| Provider | Anthropic | 01.AI |
| Noometry Index | 40.8 | 27.4 |
| Rank | 136 | 325 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Open |

## Coding

- Claude Opus 4.1: 44.3 (#69)
- Yi-34B: 31.8 (#269)

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| LMArena Coding | 1479 | 1112 |
| SWE-bench Verified | 73.3% | — |
| LMArena WebDev | 1390 | — |
| WeirdML | 45.9% | — |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |

## Agentic & Tool Use

- Claude Opus 4.1: 34.8 (#38)
- Yi-34B: —

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| Terminal-Bench | 38% | — |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |

## Reasoning

- Claude Opus 4.1: 31.6 (#70)
- Yi-34B: 20.3 (#222)

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1104 |
| Epoch Capabilities Index | 144.11 | 117.28 |
| SimpleBench | 60% | — |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LMCA | 37.1% | — |
| BIG-Bench Hard | — | 71.7% |
| ForecastBench | 62 | — |

## Math

- Claude Opus 4.1: 22.0 (#267)
- Yi-34B: 19.8 (#277)

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| LMArena Math | 1430 | 1114 |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| MATH Level 5 | — | 5.1% |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
| GSM8K | — | 76% |

## Knowledge

- Claude Opus 4.1: 41.9 (#93)
- Yi-34B: 7.5 (#304)

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| GPQA Diamond | 77.3% | 14.7% |
| LMArena Expert | 1439 | 1061 |
| Humanity's Last Exam | 11.5% | — |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |
| MMLU | — | 76.3% |

## Multimodal

- Claude Opus 4.1: 26.2 (#114)
- Yi-34B: —

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| VPCT | 35% | — |

## Multilingual

- Claude Opus 4.1: 52.1 (#90)
- Yi-34B: 29.9 (#259)

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| LMArena Non-English | 1405 | 1079 |
| LMArena Chinese | 1427 | 1175 |
| LMArena French | 1432 | 1080 |
| LMArena German | 1412 | 1042 |
| LMArena Japanese | 1378 | 993 |
| LMArena Korean | 1381 | 959 |
| LMArena Russian | 1421 | 1050 |
| LMArena Spanish | 1448 | 1070 |

## Instruction Following

- Claude Opus 4.1: 75.8 (#53)
- Yi-34B: 56.4 (#269)

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| LMArena Instruction Following | 1436 | 1091 |

## Long Context

- Claude Opus 4.1: 44.5 (#60)
- Yi-34B: 33.2 (#259)

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| LMArena Longer Query | 1455 | 1094 |

## Writing & Preference

- Claude Opus 4.1: 62.6 (#70)
- Yi-34B: 34.3 (#268)

| Benchmark | Claude Opus 4.1 | Yi-34B |
|---|---|---|
| LMArena Text | 1419 | 1129 |
| LMArena Creative Writing | 1412 | 1108 |
| LMArena Multi-Turn | 1444 | 1113 |
| Short-Story Creative Writing | 84.7% | — |

## FAQ

### Is Claude Opus 4.1 better than Yi-34B?

Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 27.4 on the Noometry Index.

### Is Claude Opus 4.1 or Yi-34B better for coding?

Claude Opus 4.1 scores higher on coding benchmarks: 44.3 versus 31.8 in the Noometry coding category.

### How many benchmarks do Claude Opus 4.1 and Yi-34B share?

19 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Yi-34B has 23.