# GPT-5.3 Codex vs Phi 3 Mini 4k Instruct June 2024

> GPT-5.3 Codex is the stronger model overall, scoring 45.5 to 30.7 on the Noometry Index.

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

## Summary

- The widest gap is in coding, where GPT-5.3 Codex leads 48.5 to 31.2.
- Phi 3 Mini 4k Instruct June 2024 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 45.5 | 30.7 |
| Rank | 61 | 274 |
| Context | 400K | — |
| Input $/M | $1.75 | — |
| Output $/M | $14 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.3 Codex: 48.5 (#51)
- Phi 3 Mini 4k Instruct June 2024: 31.2 (#275)

| Benchmark | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| SWE-bench Verified | 74.8% | — |
| LMArena WebDev | 1408 | — |
| WeirdML | 79.3% | — |
| LMArena Coding | — | 1093 |
| ALE-Bench | 1,655 | — |

## Agentic & Tool Use

- GPT-5.3 Codex: 47.8 (#9)
- Phi 3 Mini 4k Instruct June 2024: —

| Benchmark | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| Terminal-Bench | 78.4% | — |
| METR Time Horizons | 74.5% | — |
| Vending-Bench 2 | 5,940 | — |

## Reasoning

- GPT-5.3 Codex: —
- Phi 3 Mini 4k Instruct June 2024: 19.9 (#229)

| Benchmark | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| LMArena Hard Prompts | — | 1088 |
| Epoch Capabilities Index | 156.84 | — |

## Math

- GPT-5.3 Codex: —
- Phi 3 Mini 4k Instruct June 2024: 30.4 (#209)

| Benchmark | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| LMArena Math | — | 1152 |

## Knowledge

- GPT-5.3 Codex: —
- Phi 3 Mini 4k Instruct June 2024: 28.1 (#240)

| Benchmark | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| LMArena Expert | — | 1051 |

## Multilingual

- GPT-5.3 Codex: —
- Phi 3 Mini 4k Instruct June 2024: 26.0 (#277)

| Benchmark | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| LMArena Non-English | — | 1013 |
| LMArena Chinese | — | 1033 |
| LMArena German | — | 1031 |
| LMArena Japanese | — | 954 |
| LMArena Korean | — | 880 |
| LMArena Russian | — | 1019 |

## Instruction Following

- GPT-5.3 Codex: —
- Phi 3 Mini 4k Instruct June 2024: 54.3 (#277)

| Benchmark | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| LMArena Instruction Following | — | 1058 |

## Long Context

- GPT-5.3 Codex: —
- Phi 3 Mini 4k Instruct June 2024: 31.6 (#272)

| Benchmark | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| LMArena Longer Query | — | 1042 |

## Writing & Preference

- GPT-5.3 Codex: —
- Phi 3 Mini 4k Instruct June 2024: 29.7 (#289)

| Benchmark | GPT-5.3 Codex | Phi 3 Mini 4k Instruct June 2024 |
|---|---|---|
| LMArena Text | — | 1080 |
| LMArena Creative Writing | — | 1045 |
| LMArena Multi-Turn | — | 1049 |

## FAQ

### Is GPT-5.3 Codex better than Phi 3 Mini 4k Instruct June 2024?

GPT-5.3 Codex is the stronger model overall, scoring 45.5 to 30.7 on the Noometry Index.

### Is GPT-5.3 Codex or Phi 3 Mini 4k Instruct June 2024 better for coding?

GPT-5.3 Codex scores higher on coding benchmarks: 48.5 versus 31.2 in the Noometry coding category.

### How many benchmarks do GPT-5.3 Codex and Phi 3 Mini 4k Instruct June 2024 share?

0 benchmarks have published results for both models. GPT-5.3 Codex has 8 scored results on Noometry and Phi 3 Mini 4k Instruct June 2024 has 15.