# GPT-4.5 vs Yi-1.5-34B

> GPT-4.5 is the stronger model overall, scoring 36.9 to 30.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-4-5-vs-yi-1-5-34b
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. GPT-4.5 scores higher in 7 categories and Yi-1.5-34B in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where GPT-4.5 leads 52.7 to 32.5.
- The biggest single-benchmark swing is MATH Level 5: 78.6% for GPT-4.5 and 25.5% for Yi-1.5-34B.
- Yi-1.5-34B has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 36.9 | 30.2 |
| Rank | 200 | 286 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- GPT-4.5: 41.8 (#102)
- Yi-1.5-34B: 31.9 (#267)

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1397 | 1169 |
| Aider Polyglot | 44.9% | — |
| WeirdML | 39.4% | — |
| BigCodeBench Instruct | — | 33.9% |
| LiveBench Coding | 75.2% | — |
| BigCodeBench Complete | — | 43.8% |

## Agentic & Tool Use

- GPT-4.5: 27.6 (#92)
- Yi-1.5-34B: —

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| Cybench | 17.5% | — |

## Reasoning

- GPT-4.5: 14.1 (#320)
- Yi-1.5-34B: 21.5 (#195)

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1404 | 1160 |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 34.5% | — |
| ARC-AGI-1 | 10.3% | — |
| EnigmaEval | 3.2% | — |
| LiveBench Reasoning | 71.1% | — |
| LiveBench Data Analysis | 64.3% | — |
| Epoch Capabilities Index | 136.74 | — |
| ForecastBench | 61.7 | — |
| LiveBench | 69% | — |

## Math

- GPT-4.5: 31.0 (#200)
- Yi-1.5-34B: 25.3 (#248)

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1412 | 1182 |
| MATH Level 5 | 78.6% | 25.5% |
| OTIS Mock AIME 2024-2025 | 37.8% | — |
| LiveBench Math | 69.3% | — |

## Knowledge

- GPT-4.5: 32.4 (#205)
- Yi-1.5-34B: 14.8 (#290)

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | 68.7% | 32% |
| LMArena Expert | 1394 | 1144 |
| Humanity's Last Exam | 5.4% | — |
| Confabulations | 13.6% | — |

## Multimodal

- GPT-4.5: 37.0 (#68)
- Yi-1.5-34B: —

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| LMArena Vision | 1195 | — |
| VPCT | 45% | — |

## Multilingual

- GPT-4.5: 52.7 (#78)
- Yi-1.5-34B: 32.5 (#251)

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1413 | 1121 |
| LMArena Chinese | 1421 | 1213 |
| LMArena French | 1417 | 1155 |
| LMArena German | 1457 | 1111 |
| LMArena Japanese | 1416 | 1021 |
| LMArena Korean | 1392 | 1005 |
| LMArena Russian | 1419 | 1091 |
| LMArena Spanish | — | 1120 |

## Instruction Following

- GPT-4.5: 72.8 (#129)
- Yi-1.5-34B: 59.4 (#252)

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1404 | 1139 |
| LiveBench Instruction Following | 72.3% | — |

## Long Context

- GPT-4.5: 40.4 (#150)
- Yi-1.5-34B: 34.6 (#243)

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1406 | 1144 |
| Fiction.LiveBench | 63.9% | — |

## Writing & Preference

- GPT-4.5: 57.1 (#129)
- Yi-1.5-34B: 37.6 (#252)

| Benchmark | GPT-4.5 | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1417 | 1173 |
| LMArena Creative Writing | 1394 | 1135 |
| LMArena Multi-Turn | 1444 | 1153 |
| Short-Story Creative Writing | 75.6% | — |
| EQ-Bench Creative Writing | 1258 | — |
| LiveBench Language | 61.5% | — |

## FAQ

### Is GPT-4.5 better than Yi-1.5-34B?

GPT-4.5 is the stronger model overall, scoring 36.9 to 30.2 on the Noometry Index.

### Is GPT-4.5 or Yi-1.5-34B better for coding?

GPT-4.5 scores higher on coding benchmarks: 41.8 versus 31.9 in the Noometry coding category.

### How many benchmarks do GPT-4.5 and Yi-1.5-34B share?

18 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Yi-1.5-34B has 21.