# o3-mini vs Yi-1.5-34B

> o3-mini is the stronger model overall, scoring 36.7 to 30.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/o3-mini-vs-yi-1-5-34b
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. o3-mini scores higher in 6 categories and Yi-1.5-34B in 2 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where o3-mini leads 38.3 to 14.8.
- The biggest single-benchmark swing is MATH Level 5: 96.5% for o3-mini and 25.5% for Yi-1.5-34B.
- Yi-1.5-34B has downloadable open weights; the other is API-only.

## Snapshot

| | o3-mini | Yi-1.5-34B |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 36.7 | 30.2 |
| Rank | 205 | 286 |
| Context | 200K | — |
| Input $/M | $1.10 | — |
| Output $/M | $4.40 | — |
| Weights | Proprietary | Open |

## Coding

- o3-mini: 41.4 (#116)
- Yi-1.5-34B: 31.9 (#267)

| Benchmark | o3-mini | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1378 | 1169 |
| Aider Polyglot | 60.4% | — |
| SciCode | 39.8% | — |
| GSO | 1.3% | — |
| WeirdML | 43.7% | — |
| BigCodeBench Instruct | — | 33.9% |
| LiveBench Coding | 82.7% | — |
| BigCodeBench Complete | — | 43.8% |
| CadEval | 54% | — |

## Agentic & Tool Use

- o3-mini: 29.3 (#79)
- Yi-1.5-34B: —

| Benchmark | o3-mini | Yi-1.5-34B |
|---|---|---|
| Cybench | 22.5% | — |

## Reasoning

- o3-mini: 16.3 (#295)
- Yi-1.5-34B: 21.5 (#195)

| Benchmark | o3-mini | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1366 | 1160 |
| ARC-AGI-2 | 3% | — |
| SimpleBench | 22.8% | — |
| ARC-AGI-1 | 34.5% | — |
| CritPt | 0.3% | — |
| Chess Puzzles | 17% | — |
| LiveBench Reasoning | 89.6% | — |
| Mystery Game Puzzles | 7% | — |
| DTBench | 68.8% | — |
| LiveBench Data Analysis | 70.6% | — |
| LMCA | 19% | — |
| Epoch Capabilities Index | 140.35 | — |
| ForecastBench | 59.6 | — |
| LiveBench | 75.9% | — |

## Math

- o3-mini: 27.6 (#236)
- Yi-1.5-34B: 25.3 (#248)

| Benchmark | o3-mini | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1396 | 1182 |
| MATH Level 5 | 96.5% | 25.5% |
| FrontierMath (Tiers 1-3) | 18.6% | — |
| FrontierMath Tier 4 | 0% | — |
| OTIS Mock AIME 2024-2025 | 76.9% | — |
| LiveBench Math | 77.3% | — |
| FrontierMath (Feb 2025 set) | 12.4% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- o3-mini: 38.3 (#135)
- Yi-1.5-34B: 14.8 (#290)

| Benchmark | o3-mini | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | 77% | 32% |
| LMArena Expert | 1364 | 1144 |
| SimpleQA Verified | 15.3% | — |
| Confabulations | 17.9% | — |

## Multilingual

- o3-mini: 45.9 (#159)
- Yi-1.5-34B: 32.5 (#251)

| Benchmark | o3-mini | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1319 | 1121 |
| LMArena Chinese | 1379 | 1213 |
| LMArena French | 1333 | 1155 |
| LMArena German | 1303 | 1111 |
| LMArena Japanese | 1286 | 1021 |
| LMArena Korean | 1314 | 1005 |
| LMArena Russian | 1304 | 1091 |
| LMArena Spanish | 1321 | 1120 |

## Instruction Following

- o3-mini: 75.3 (#67)
- Yi-1.5-34B: 59.4 (#252)

| Benchmark | o3-mini | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1338 | 1139 |
| LiveBench Instruction Following | 84.4% | — |

## Long Context

- o3-mini: 33.8 (#251)
- Yi-1.5-34B: 34.6 (#243)

| Benchmark | o3-mini | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1343 | 1144 |
| Fiction.LiveBench | 50% | — |

## Writing & Preference

- o3-mini: 50.4 (#177)
- Yi-1.5-34B: 37.6 (#252)

| Benchmark | o3-mini | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1337 | 1173 |
| LMArena Creative Writing | 1286 | 1135 |
| LMArena Multi-Turn | 1320 | 1153 |
| Short-Story Creative Writing | 61.7% | — |
| LiveBench Language | 50.7% | — |

## FAQ

### Is o3-mini better than Yi-1.5-34B?

o3-mini is the stronger model overall, scoring 36.7 to 30.2 on the Noometry Index.

### Is o3-mini or Yi-1.5-34B better for coding?

o3-mini scores higher on coding benchmarks: 41.4 versus 31.9 in the Noometry coding category.

### How many benchmarks do o3-mini and Yi-1.5-34B share?

19 benchmarks have published results for both models. o3-mini has 51 scored results on Noometry and Yi-1.5-34B has 21.