# GPT-5.5 Pro vs Phi 3 Medium 4k Instruct

> GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 32.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-5-pro-vs-phi-3-medium-4k-instruct
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where GPT-5.5 Pro leads 83.8 to 30.9.
- Phi 3 Medium 4k Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.5 Pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 64.3 | 32.4 |
| Rank | 7 | 246 |
| Context | 1.05M | — |
| Input $/M | $30 | — |
| Output $/M | $180 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.5 Pro: —
- Phi 3 Medium 4k Instruct: 32.3 (#263)

| Benchmark | GPT-5.5 Pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Coding | — | 1130 |

## Reasoning

- GPT-5.5 Pro: 73.6 (#7)
- Phi 3 Medium 4k Instruct: 20.8 (#214)

| Benchmark | GPT-5.5 Pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1127 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.45 | — |

## Math

- GPT-5.5 Pro: 83.8 (#8)
- Phi 3 Medium 4k Instruct: 30.9 (#202)

| Benchmark | GPT-5.5 Pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1173 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |

## Knowledge

- GPT-5.5 Pro: 64.2 (#17)
- Phi 3 Medium 4k Instruct: 29.6 (#226)

| Benchmark | GPT-5.5 Pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| LMArena Expert | — | 1108 |

## Multilingual

- GPT-5.5 Pro: —
- Phi 3 Medium 4k Instruct: 30.8 (#258)

| Benchmark | GPT-5.5 Pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Non-English | — | 1094 |
| LMArena Chinese | — | 1108 |
| LMArena French | — | 1109 |
| LMArena German | — | 1101 |
| LMArena Japanese | — | 1042 |
| LMArena Korean | — | 954 |
| LMArena Russian | — | 1145 |
| LMArena Spanish | — | 1095 |

## Instruction Following

- GPT-5.5 Pro: —
- Phi 3 Medium 4k Instruct: 57.8 (#263)

| Benchmark | GPT-5.5 Pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Instruction Following | — | 1114 |

## Long Context

- GPT-5.5 Pro: —
- Phi 3 Medium 4k Instruct: 33.9 (#250)

| Benchmark | GPT-5.5 Pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Longer Query | — | 1120 |

## Writing & Preference

- GPT-5.5 Pro: —
- Phi 3 Medium 4k Instruct: 34.3 (#267)

| Benchmark | GPT-5.5 Pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Text | — | 1138 |
| LMArena Creative Writing | — | 1106 |
| LMArena Multi-Turn | — | 1088 |

## FAQ

### Is GPT-5.5 Pro better than Phi 3 Medium 4k Instruct?

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 32.4 on the Noometry Index.

### How many benchmarks do GPT-5.5 Pro and Phi 3 Medium 4k Instruct share?

0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Phi 3 Medium 4k Instruct has 17.