# GPT-5.3 Chat vs Phi-4 Mini

> GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.9 on the Noometry Index. Phi-4 Mini costs 37× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-phi-4-mini
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in knowledge, where GPT-5.3 Chat leads 38.8 to 25.3.
- Phi-4 Mini is cheaper at $0.075 / $0.30 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- Phi-4 Mini has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 42.8 | 30.9 |
| Rank | 109 | 283 |
| Context | 128K | 128K |
| Input $/M | $1.75 | $0.075 |
| Output $/M | $14 | $0.30 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.3 Chat: 41.4 (#124)
- Phi-4 Mini: 28.1 (#317)

| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| SciCode | — | 10.8% |
| LMArena Coding | 1408 | — |

## Reasoning

- GPT-5.3 Chat: 28.5 (#102)
- Phi-4 Mini: 22.4 (#195)

| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| CritPt | — | 0% |
| LMArena Hard Prompts | 1399 | — |

## Math

- GPT-5.3 Chat: 38.2 (#142)
- Phi-4 Mini: —

| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Math | 1389 | — |

## Knowledge

- GPT-5.3 Chat: 38.8 (#140)
- Phi-4 Mini: 25.3 (#262)

| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| Vectara Hallucination Rate | — | 23.5% |
| LMArena Expert | 1397 | — |

## Multilingual

- GPT-5.3 Chat: 50.3 (#124)
- Phi-4 Mini: —

| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Non-English | 1382 | — |
| LMArena Chinese | 1432 | — |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |

## Instruction Following

- GPT-5.3 Chat: 72.8 (#129)
- Phi-4 Mini: —

| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Instruction Following | 1378 | — |

## Long Context

- GPT-5.3 Chat: 42.6 (#120)
- Phi-4 Mini: —

| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Longer Query | 1396 | — |

## Writing & Preference

- GPT-5.3 Chat: 63.1 (#68)
- Phi-4 Mini: —

| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1355 | — |
| EQ-Bench Creative Writing | 1690 | — |
| LMArena Multi-Turn | 1412 | — |

## FAQ

### Is GPT-5.3 Chat better than Phi-4 Mini?

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.9 on the Noometry Index. Phi-4 Mini costs 37× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.3 Chat or Phi-4 Mini?

Phi-4 Mini is cheaper. It lists at $0.075 per million input tokens and $0.30 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

### Is GPT-5.3 Chat or Phi-4 Mini better for coding?

GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 28.1 in the Noometry coding category.

### Which has the bigger context window?

Both accept 128K tokens.

### How many benchmarks do GPT-5.3 Chat and Phi-4 Mini share?

0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Phi-4 Mini has 3.