# Phi 3 Medium 4k Instruct vs Yi-1.5-34B

> Phi 3 Medium 4k Instruct is the stronger model overall, scoring 32.4 to 30.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/phi-3-medium-4k-instruct-vs-yi-1-5-34b
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Phi 3 Medium 4k Instruct scores higher in 3 categories and Yi-1.5-34B in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Phi 3 Medium 4k Instruct leads 29.6 to 14.8.

## Snapshot

| | Phi 3 Medium 4k Instruct | Yi-1.5-34B |
|---|---|---|
| Provider | Microsoft | 01.AI |
| Noometry Index | 32.4 | 30.2 |
| Rank | 246 | 286 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Open |

## Coding

- Phi 3 Medium 4k Instruct: 32.3 (#263)
- Yi-1.5-34B: 31.9 (#267)

| Benchmark | Phi 3 Medium 4k Instruct | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1130 | 1169 |
| BigCodeBench Instruct | — | 33.9% |
| BigCodeBench Complete | — | 43.8% |

## Reasoning

- Phi 3 Medium 4k Instruct: 20.8 (#214)
- Yi-1.5-34B: 21.5 (#195)

| Benchmark | Phi 3 Medium 4k Instruct | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1127 | 1160 |

## Math

- Phi 3 Medium 4k Instruct: 30.9 (#202)
- Yi-1.5-34B: 25.3 (#248)

| Benchmark | Phi 3 Medium 4k Instruct | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1173 | 1182 |
| MATH Level 5 | — | 25.5% |

## Knowledge

- Phi 3 Medium 4k Instruct: 29.6 (#226)
- Yi-1.5-34B: 14.8 (#290)

| Benchmark | Phi 3 Medium 4k Instruct | Yi-1.5-34B |
|---|---|---|
| LMArena Expert | 1108 | 1144 |
| GPQA Diamond | — | 32% |

## Multilingual

- Phi 3 Medium 4k Instruct: 30.8 (#258)
- Yi-1.5-34B: 32.5 (#251)

| Benchmark | Phi 3 Medium 4k Instruct | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1094 | 1121 |
| LMArena Chinese | 1108 | 1213 |
| LMArena French | 1109 | 1155 |
| LMArena German | 1101 | 1111 |
| LMArena Japanese | 1042 | 1021 |
| LMArena Korean | 954 | 1005 |
| LMArena Russian | 1145 | 1091 |
| LMArena Spanish | 1095 | 1120 |

## Instruction Following

- Phi 3 Medium 4k Instruct: 57.8 (#263)
- Yi-1.5-34B: 59.4 (#252)

| Benchmark | Phi 3 Medium 4k Instruct | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1114 | 1139 |

## Long Context

- Phi 3 Medium 4k Instruct: 33.9 (#250)
- Yi-1.5-34B: 34.6 (#243)

| Benchmark | Phi 3 Medium 4k Instruct | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1120 | 1144 |

## Writing & Preference

- Phi 3 Medium 4k Instruct: 34.3 (#267)
- Yi-1.5-34B: 37.6 (#252)

| Benchmark | Phi 3 Medium 4k Instruct | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1138 | 1173 |
| LMArena Creative Writing | 1106 | 1135 |
| LMArena Multi-Turn | 1088 | 1153 |

## FAQ

### Is Phi 3 Medium 4k Instruct better than Yi-1.5-34B?

Phi 3 Medium 4k Instruct is the stronger model overall, scoring 32.4 to 30.2 on the Noometry Index.

### Is Phi 3 Medium 4k Instruct or Yi-1.5-34B better for coding?

They score almost the same on coding (32.3 vs 31.9); test both on your own repository before choosing.

### How many benchmarks do Phi 3 Medium 4k Instruct and Yi-1.5-34B share?

17 benchmarks have published results for both models. Phi 3 Medium 4k Instruct has 17 scored results on Noometry and Yi-1.5-34B has 21.