# Claude Opus 4.5 vs Yi-Lightning

> Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 37.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-5-vs-yi-lightning
- Last updated: 2026-10-11
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Claude Opus 4.5 scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where Claude Opus 4.5 leads 54.8 to 27.4.

## Snapshot

| | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| Provider | Anthropic | 01.AI |
| Noometry Index | 50.5 | 37.1 |
| Rank | 47 | 209 |
| Context | 200K | — |
| Input $/M | $5 | — |
| Output $/M | $25 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4.5: 54.8 (#27)
- Yi-Lightning: 27.4 (#320)

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1504 | 1312 |
| SWE-bench Verified | 76.7% | — |
| SWE-bench Verified (bash only) | 76.8% | — |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1494 | — |
| SWE-bench Multilingual | 70.7% | — |
| GSO | 26.5% | — |
| WeirdML | 63.7% | — |
| ALE-Bench | 1,025 | — |
| AlgoTune | 1.77 | — |

## Agentic & Tool Use

- Claude Opus 4.5: 47.3 (#12)
- Yi-Lightning: —

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| Terminal-Bench | 63.1% | — |
| Berkeley Function Calling Leaderboard | 77.5% | — |
| GDPval | 45.5% | — |
| Remote Labor Index | 3.8% | — |
| τ²-bench Airline | 84% | — |
| τ²-bench Banking | 24.7% | — |
| τ²-bench Retail | 79.6% | — |
| τ²-bench Telecom | 92.3% | — |
| Cybench | 82% | — |
| DeepResearch Bench | 54.8% | — |
| OSWorld | 66.3% | — |
| BALROG | 43.5% | — |
| LMArena Search | 1180 | — |
| METR Time Horizons | 75% | — |
| Vending-Bench 2 | 4,967 | — |

## Reasoning

- Claude Opus 4.5: 42.6 (#51)
- Yi-Lightning: 25.9 (#139)

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1476 | 1302 |
| ARC-AGI-2 | 37.6% | — |
| SimpleBench | 62% | — |
| Kagi LLM Benchmark | 80.2% | — |
| NYT Connections (extended) | 52.5% | — |
| ARC-AGI-1 | 80% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 11.9% | — |
| EBR-Bench | 14.3% | — |
| Mystery Game Puzzles | 22% | — |
| DTBench | 89.9% | — |
| LMCA | 44.5% | — |
| Epoch Capabilities Index | 150.09 | — |
| ForecastBench | 60.7 | — |

## Math

- Claude Opus 4.5: 38.6 (#132)
- Yi-Lightning: 36.2 (#172)

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Math | 1463 | 1300 |
| FrontierMath (Tiers 1-3) | 34.4% | — |
| FrontierMath Tier 4 | 4.9% | — |
| OTIS Mock AIME 2024-2025 | 86.1% | — |
| ProofBench | 36% | — |
| FrontierMath (Feb 2025 set) | 20.7% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4.5: 56.5 (#44)
- Yi-Lightning: 35.4 (#185)

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1487 | 1286 |
| GPQA Diamond | 86% | — |
| Humanity's Last Exam | 25.2% | — |
| SimpleQA Verified | 45.7% | — |
| Vectara Hallucination Rate | 10.9% | — |

## Multimodal

- Claude Opus 4.5: 31.4 (#107)
- Yi-Lightning: —

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| GeoBench | 75% | — |
| VPCT | 40% | — |
| Furniture Assembly | 28.3% | — |
| LMArena Document | 1462 | — |

## Multilingual

- Claude Opus 4.5: 54.3 (#47)
- Yi-Lightning: 42.2 (#196)

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1438 | 1269 |
| LMArena Chinese | 1470 | 1320 |
| LMArena French | 1471 | 1305 |
| LMArena German | 1449 | 1267 |
| LMArena Japanese | 1416 | 1228 |
| LMArena Korean | 1424 | 1192 |
| LMArena Russian | 1447 | 1255 |
| LMArena Spanish | 1458 | 1315 |

## Instruction Following

- Claude Opus 4.5: 77.5 (#19)
- Yi-Lightning: 67.4 (#196)

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1478 | 1278 |

## Long Context

- Claude Opus 4.5: 46.5 (#22)
- Yi-Lightning: 39.4 (#181)

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1480 | 1297 |
| CL-bench | 21.1% | — |

## Writing & Preference

- Claude Opus 4.5: 68.1 (#28)
- Yi-Lightning: 50.2 (#184)

| Benchmark | Claude Opus 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1451 | 1302 |
| LMArena Creative Writing | 1445 | 1280 |
| LMArena Multi-Turn | 1466 | 1311 |
| EQ-Bench Creative Writing | 1687 | — |

## FAQ

### Is Claude Opus 4.5 better than Yi-Lightning?

Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 37.1 on the Noometry Index.

### Is Claude Opus 4.5 or Yi-Lightning better for coding?

Claude Opus 4.5 scores higher on coding benchmarks: 54.8 versus 27.4 in the Noometry coding category.

### How many benchmarks do Claude Opus 4.5 and Yi-Lightning share?

17 benchmarks have published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and Yi-Lightning has 18.