# o1 vs Yi-1.5-34B

> o1 is the stronger model overall, scoring 40.9 to 30.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/o1-vs-yi-1-5-34b
- Last updated: 2026-10-11
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. o1 scores higher in 8 categories and Yi-1.5-34B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where o1 leads 41.5 to 14.8.
- The biggest single-benchmark swing is MATH Level 5: 94.7% for o1 and 25.5% for Yi-1.5-34B.
- Yi-1.5-34B has downloadable open weights; the other is API-only.

## Snapshot

| | o1 | Yi-1.5-34B |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 40.9 | 30.6 |
| Rank | 143 | 289 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $60 | — |
| Weights | Proprietary | Open |

## Coding

- o1: 46.1 (#70)
- Yi-1.5-34B: 32.4 (#272)

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1367 | 1169 |
| Aider Polyglot | 61.7% | — |
| WeirdML | 47.6% | — |
| BigCodeBench Instruct | — | 33.9% |
| LiveBench Coding | 69.7% | — |
| BigCodeBench Complete | — | 43.8% |
| CadEval | 56% | — |
| HumanEval+ | 89% | — |
| MBPP+ | 80.2% | — |

## Agentic & Tool Use

- o1: 24.6 (#117)
- Yi-1.5-34B: —

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| Cybench | 10% | — |
| METR Time Horizons | 51.1% | — |

## Reasoning

- o1: 27.9 (#111)
- Yi-1.5-34B: 22.5 (#191)

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1371 | 1160 |
| SimpleBench | 41.7% | — |
| ARC-AGI-1 | 30.7% | — |
| Chess Puzzles | 15% | — |
| EnigmaEval | 5.7% | — |
| LiveBench Reasoning | 91.6% | — |
| DTBench | 74.7% | — |
| LiveBench Data Analysis | 65.5% | — |
| LMCA | 22.3% | — |
| Epoch Capabilities Index | 141.91 | — |
| LiveBench | 75.7% | — |

## Math

- o1: 36.1 (#175)
- Yi-1.5-34B: 27.5 (#249)

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1388 | 1182 |
| MATH Level 5 | 94.7% | 25.5% |
| FrontierMath (Tiers 1-3) | 14.7% | — |
| OTIS Mock AIME 2024-2025 | 73.3% | — |
| LiveBench Math | 80.3% | — |
| FrontierMath (Feb 2025 set) | 9.3% | — |

## Knowledge

- o1: 41.5 (#110)
- Yi-1.5-34B: 14.8 (#295)

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | 76.8% | 32% |
| LMArena Expert | 1361 | 1144 |
| Humanity's Last Exam | 8% | — |
| SimpleQA Verified | 41.1% | — |
| Confabulations | 11.7% | — |

## Multimodal

- o1: 34.2 (#93)
- Yi-1.5-34B: —

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| LMArena Vision | 1168 | — |
| GeoBench | 80% | — |
| VPCT | 37% | — |
| SpatialViz-Bench | 41.4% | — |

## Multilingual

- o1: 48.6 (#142)
- Yi-1.5-34B: 32.3 (#256)

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1358 | 1121 |
| LMArena Chinese | 1394 | 1213 |
| LMArena French | 1344 | 1156 |
| LMArena German | 1337 | 1111 |
| LMArena Japanese | 1346 | 1021 |
| LMArena Korean | 1396 | 1005 |
| LMArena Russian | 1356 | 1091 |
| LMArena Spanish | 1345 | 1121 |

## Instruction Following

- o1: 74.8 (#86)
- Yi-1.5-34B: 59.2 (#257)

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1367 | 1139 |
| LiveBench Instruction Following | 81.5% | — |

## Long Context

- o1: 50.3 (#9)
- Yi-1.5-34B: 34.6 (#248)

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1378 | 1143 |
| Fiction.LiveBench | 83.3% | — |

## Writing & Preference

- o1: 55.6 (#144)
- Yi-1.5-34B: 37.4 (#257)

| Benchmark | o1 | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1366 | 1173 |
| LMArena Creative Writing | 1348 | 1135 |
| LMArena Multi-Turn | 1369 | 1153 |
| Short-Story Creative Writing | 70.2% | — |
| LiveBench Language | 65.4% | — |

## FAQ

### Is o1 better than Yi-1.5-34B?

o1 is the stronger model overall, scoring 40.9 to 30.6 on the Noometry Index.

### Is o1 or Yi-1.5-34B better for coding?

o1 scores higher on coding benchmarks: 46.1 versus 32.4 in the Noometry coding category.

### How many benchmarks do o1 and Yi-1.5-34B share?

19 benchmarks have published results for both models. o1 has 52 scored results on Noometry and Yi-1.5-34B has 21.