# Claude Opus 4.1 vs Yi-Lightning

> Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 36.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-1-vs-yi-lightning
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Claude Opus 4.1 scores higher in 7 categories and Yi-Lightning in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where Claude Opus 4.1 leads 44.3 to 27.0.

## Snapshot

| | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| Provider | Anthropic | 01.AI |
| Noometry Index | 40.8 | 36.5 |
| Rank | 136 | 206 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4.1: 44.3 (#69)
- Yi-Lightning: 27.0 (#315)

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1479 | 1313 |
| SWE-bench Verified | 73.3% | — |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1390 | — |
| WeirdML | 45.9% | — |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |

## Agentic & Tool Use

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

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| 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-Lightning: 24.9 (#137)

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1302 |
| SimpleBench | 60% | — |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LMCA | 37.1% | — |
| Epoch Capabilities Index | 144.11 | — |
| ForecastBench | 62 | — |

## Math

- Claude Opus 4.1: 22.0 (#267)
- Yi-Lightning: 33.5 (#173)

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Math | 1430 | 1300 |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4.1: 41.9 (#93)
- Yi-Lightning: 34.8 (#182)

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1439 | 1286 |
| GPQA Diamond | 77.3% | — |
| Humanity's Last Exam | 11.5% | — |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |

## Multimodal

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

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| VPCT | 35% | — |

## Multilingual

- Claude Opus 4.1: 52.1 (#90)
- Yi-Lightning: 42.4 (#191)

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1405 | 1269 |
| LMArena Chinese | 1427 | 1320 |
| LMArena French | 1432 | 1304 |
| LMArena German | 1412 | 1267 |
| LMArena Japanese | 1378 | 1228 |
| LMArena Korean | 1381 | 1192 |
| LMArena Russian | 1421 | 1255 |
| LMArena Spanish | 1448 | 1315 |

## Instruction Following

- Claude Opus 4.1: 75.8 (#53)
- Yi-Lightning: 67.6 (#191)

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1436 | 1278 |

## Long Context

- Claude Opus 4.1: 44.5 (#60)
- Yi-Lightning: 39.4 (#176)

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1455 | 1297 |

## Writing & Preference

- Claude Opus 4.1: 62.6 (#70)
- Yi-Lightning: 50.4 (#178)

| Benchmark | Claude Opus 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1419 | 1302 |
| LMArena Creative Writing | 1412 | 1280 |
| LMArena Multi-Turn | 1444 | 1311 |
| Short-Story Creative Writing | 84.7% | — |

## FAQ

### Is Claude Opus 4.1 better than Yi-Lightning?

Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 36.5 on the Noometry Index.

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

Claude Opus 4.1 scores higher on coding benchmarks: 44.3 versus 27.0 in the Noometry coding category.

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

17 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Yi-Lightning has 18.