# Phi-2 vs Yi-1.5-34B

> Yi-1.5-34B has enough public results to be ranked (#289); Phi-2 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/phi-2-vs-yi-1-5-34b
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Snapshot

| | Phi-2 | Yi-1.5-34B |
|---|---|---|
| Provider | Microsoft | 01.AI |
| Noometry Index | — | 30.6 |
| Rank | — | 289 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Open |

## Coding

- Phi-2: —
- Yi-1.5-34B: 32.4 (#272)

| Benchmark | Phi-2 | Yi-1.5-34B |
|---|---|---|
| BigCodeBench Instruct | — | 33.9% |
| LMArena Coding | — | 1169 |
| BigCodeBench Complete | — | 43.8% |
| HumanEval+ | 45.1% | — |
| MBPP+ | 54.2% | — |

## Reasoning

- Phi-2: —
- Yi-1.5-34B: 22.5 (#191)

| Benchmark | Phi-2 | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | — | 1160 |
| Adversarial NLI | 42.5% | — |
| BIG-Bench Hard | 59.4% | — |
| Epoch Capabilities Index | 107.94 | — |
| HellaSwag | 53.6% | — |
| WinoGrande | 54.7% | — |

## Math

- Phi-2: —
- Yi-1.5-34B: 27.5 (#249)

| Benchmark | Phi-2 | Yi-1.5-34B |
|---|---|---|
| LMArena Math | — | 1182 |
| MATH Level 5 | — | 25.5% |

## Knowledge

- Phi-2: —
- Yi-1.5-34B: 14.8 (#295)

| Benchmark | Phi-2 | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | — | 32% |
| LMArena Expert | — | 1144 |
| ARC (AI2) Challenge | 75.9% | — |
| MMLU | 58.4% | — |
| OpenBookQA | 73.6% | — |
| TriviaQA | 45.2% | — |

## Multilingual

- Phi-2: —
- Yi-1.5-34B: 32.3 (#256)

| Benchmark | Phi-2 | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | — | 1121 |
| LMArena Chinese | — | 1213 |
| LMArena French | — | 1156 |
| LMArena German | — | 1111 |
| LMArena Japanese | — | 1021 |
| LMArena Korean | — | 1005 |
| LMArena Russian | — | 1091 |
| LMArena Spanish | — | 1121 |

## Instruction Following

- Phi-2: —
- Yi-1.5-34B: 59.2 (#257)

| Benchmark | Phi-2 | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | — | 1139 |

## Long Context

- Phi-2: —
- Yi-1.5-34B: 34.6 (#248)

| Benchmark | Phi-2 | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | — | 1143 |

## Writing & Preference

- Phi-2: —
- Yi-1.5-34B: 37.4 (#257)

| Benchmark | Phi-2 | Yi-1.5-34B |
|---|---|---|
| LMArena Text | — | 1173 |
| LMArena Creative Writing | — | 1135 |
| LMArena Multi-Turn | — | 1153 |

## FAQ

### Is Phi-2 better than Yi-1.5-34B?

Yi-1.5-34B has enough public results to be ranked (#289); Phi-2 does not yet, so treat this comparison as directional.

### How many benchmarks do Phi-2 and Yi-1.5-34B share?

0 benchmarks have published results for both models. Phi-2 has 11 scored results on Noometry and Yi-1.5-34B has 21.