# GPT-4.5 vs Phi 3 Small 8k Instruct

> GPT-4.5 is the stronger model overall, scoring 37.2 to 29.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-4-5-vs-phi-3-small-8k-instruct
- Last updated: 2026-10-11
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. GPT-4.5 scores higher in 7 categories and Phi 3 Small 8k Instruct in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-4.5 leads 56.9 to 31.1.
- The biggest single-benchmark swing is LiveBench Reasoning: 71.1% for GPT-4.5 and 15.9% for Phi 3 Small 8k Instruct.
- Phi 3 Small 8k Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 37.2 | 29.3 |
| Rank | 208 | 314 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- GPT-4.5: 42.2 (#109)
- Phi 3 Small 8k Instruct: 27.9 (#318)

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LiveBench Coding | 75.2% | 20.3% |
| LMArena Coding | 1396 | 1101 |
| Aider Polyglot | 44.9% | — |
| WeirdML | 39.4% | — |

## Agentic & Tool Use

- GPT-4.5: 27.9 (#97)
- Phi 3 Small 8k Instruct: —

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| Cybench | 17.5% | — |

## Reasoning

- GPT-4.5: 13.9 (#330)
- Phi 3 Small 8k Instruct: 14.8 (#323)

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LiveBench Reasoning | 71.1% | 15.9% |
| LMArena Hard Prompts | 1403 | 1100 |
| LiveBench Data Analysis | 64.3% | 30.3% |
| LiveBench | 69% | 24% |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 34.5% | — |
| ARC-AGI-1 | 10.3% | — |
| EnigmaEval | 3.2% | — |
| Adversarial NLI | — | 58.1% |
| BIG-Bench Hard | — | 79.1% |
| Epoch Capabilities Index | 136.74 | — |
| ForecastBench | 61.7 | — |
| HellaSwag | — | 77% |
| WinoGrande | — | 81.5% |

## Math

- GPT-4.5: 32.6 (#211)
- Phi 3 Small 8k Instruct: 27.6 (#248)

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LiveBench Math | 69.3% | 17.6% |
| LMArena Math | 1412 | 1151 |
| OTIS Mock AIME 2024-2025 | 37.8% | — |
| MATH Level 5 | 78.6% | — |

## Knowledge

- GPT-4.5: 32.5 (#211)
- Phi 3 Small 8k Instruct: 29.1 (#240)

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Expert | 1394 | 1067 |
| GPQA Diamond | 68.7% | — |
| Humanity's Last Exam | 5.4% | — |
| Confabulations | 13.6% | — |
| ARC (AI2) Challenge | — | 90.7% |
| MMLU | — | 75.7% |
| OpenBookQA | — | 88% |
| TriviaQA | — | 58.1% |

## Multimodal

- GPT-4.5: 37.6 (#71)
- Phi 3 Small 8k Instruct: —

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Vision | 1195 | — |
| VPCT | 45% | — |

## Multilingual

- GPT-4.5: 52.5 (#83)
- Phi 3 Small 8k Instruct: 28.5 (#272)

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Non-English | 1413 | 1058 |
| LMArena Chinese | 1421 | 1061 |
| LMArena French | 1418 | 1135 |
| LMArena German | 1457 | 1080 |
| LMArena Japanese | 1416 | 966 |
| LMArena Korean | 1392 | 894 |
| LMArena Russian | 1419 | 1111 |
| LMArena Spanish | — | 1111 |

## Instruction Following

- GPT-4.5: 72.6 (#134)
- Phi 3 Small 8k Instruct: 51.9 (#292)

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LiveBench Instruction Following | 72.3% | 47.2% |
| LMArena Instruction Following | 1404 | 1087 |

## Long Context

- GPT-4.5: 40.4 (#155)
- Phi 3 Small 8k Instruct: 33.0 (#267)

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Longer Query | 1406 | 1088 |
| Fiction.LiveBench | 63.9% | — |

## Writing & Preference

- GPT-4.5: 56.9 (#134)
- Phi 3 Small 8k Instruct: 31.1 (#284)

| Benchmark | GPT-4.5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Text | 1417 | 1110 |
| LMArena Creative Writing | 1394 | 1083 |
| LMArena Multi-Turn | 1444 | 1068 |
| LiveBench Language | 61.5% | 12.9% |
| Short-Story Creative Writing | 75.6% | — |
| EQ-Bench Creative Writing | 1258 | — |

## FAQ

### Is GPT-4.5 better than Phi 3 Small 8k Instruct?

GPT-4.5 is the stronger model overall, scoring 37.2 to 29.3 on the Noometry Index.

### Is GPT-4.5 or Phi 3 Small 8k Instruct better for coding?

GPT-4.5 scores higher on coding benchmarks: 42.2 versus 27.9 in the Noometry coding category.

### How many benchmarks do GPT-4.5 and Phi 3 Small 8k Instruct share?

23 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Phi 3 Small 8k Instruct has 32.