# GPT-5.5 Instant vs Phi-4 Mini

> GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 30.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-5-instant-vs-phi-4-mini
- Last updated: 2026-10-11
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. GPT-5.5 Instant scores higher in 3 categories and Phi-4 Mini in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 25.3.
- The biggest single-benchmark swing is SciCode: 48.6% for GPT-5.5 Instant and 10.8% for Phi-4 Mini.
- Phi-4 Mini has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 42.7 | 30.9 |
| Rank | 110 | 283 |
| Context | — | 128K |
| Input $/M | — | $0.075 |
| Output $/M | — | $0.30 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.5 Instant: 44.3 (#74)
- Phi-4 Mini: 28.1 (#317)

| Benchmark | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| SciCode | 48.6% | 10.8% |
| LMArena Coding | 1433 | — |

## Reasoning

- GPT-5.5 Instant: 24.9 (#155)
- Phi-4 Mini: 22.4 (#195)

| Benchmark | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| CritPt | 0% | 0% |
| Chess Puzzles | 12% | — |
| LMArena Hard Prompts | 1426 | — |
| Epoch Capabilities Index | 142.52 | — |

## Math

- GPT-5.5 Instant: 26.5 (#259)
- Phi-4 Mini: —

| Benchmark | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
| LMArena Math | 1420 | — |

## Knowledge

- GPT-5.5 Instant: 48.9 (#74)
- Phi-4 Mini: 25.3 (#262)

| Benchmark | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| GPQA Diamond | 82.5% | — |
| Vectara Hallucination Rate | — | 23.5% |
| LMArena Expert | 1409 | — |

## Multimodal

- GPT-5.5 Instant: 40.0 (#52)
- Phi-4 Mini: —

| Benchmark | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |

## Multilingual

- GPT-5.5 Instant: 52.8 (#80)
- Phi-4 Mini: —

| Benchmark | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| LMArena Non-English | 1417 | — |
| LMArena Chinese | 1456 | — |
| LMArena French | 1428 | — |
| LMArena German | 1411 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1392 | — |
| LMArena Russian | 1431 | — |
| LMArena Spanish | 1429 | — |

## Instruction Following

- GPT-5.5 Instant: 74.2 (#100)
- Phi-4 Mini: —

| Benchmark | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| LMArena Instruction Following | 1406 | — |

## Long Context

- GPT-5.5 Instant: 43.4 (#96)
- Phi-4 Mini: —

| Benchmark | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| LMArena Longer Query | 1422 | — |

## Writing & Preference

- GPT-5.5 Instant: 61.8 (#85)
- Phi-4 Mini: —

| Benchmark | GPT-5.5 Instant | Phi-4 Mini |
|---|---|---|
| LMArena Text | 1419 | — |
| LMArena Creative Writing | 1419 | — |
| LMArena Multi-Turn | 1433 | — |

## FAQ

### Is GPT-5.5 Instant better than Phi-4 Mini?

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 30.9 on the Noometry Index.

### Is GPT-5.5 Instant or Phi-4 Mini better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 28.1 in the Noometry coding category.

### How many benchmarks do GPT-5.5 Instant and Phi-4 Mini share?

2 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Phi-4 Mini has 3.