# GPT-5.3 Codex vs Qwen2.5 Plus 1127

> GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 38.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-3-codex-vs-qwen2-5-plus
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-5.3 Codex leads 48.6 to 38.5.

## Snapshot

| | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 45.8 | 38.8 |
| Rank | 69 | 181 |
| Context | 400K | — |
| Input $/M | $1.75 | — |
| Output $/M | $14 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.3 Codex: 48.6 (#56)
- Qwen2.5 Plus 1127: 38.5 (#175)

| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| SWE-bench Verified | 74.8% | — |
| LMArena WebDev | 1409 | — |
| WeirdML | 79.3% | — |
| LMArena Coding | — | 1314 |
| ALE-Bench | 1,655 | — |

## Agentic & Tool Use

- GPT-5.3 Codex: 48.0 (#9)
- Qwen2.5 Plus 1127: —

| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| Terminal-Bench | 78.4% | — |
| METR Time Horizons | 74.5% | — |
| Vending-Bench 2 | 5,940 | — |

## Reasoning

- GPT-5.3 Codex: —
- Qwen2.5 Plus 1127: 25.9 (#141)

| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Hard Prompts | — | 1299 |
| Epoch Capabilities Index | 156.77 | — |

## Math

- GPT-5.3 Codex: —
- Qwen2.5 Plus 1127: 36.1 (#174)

| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Math | — | 1298 |

## Knowledge

- GPT-5.3 Codex: —
- Qwen2.5 Plus 1127: 35.5 (#183)

| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Expert | — | 1289 |

## Multilingual

- GPT-5.3 Codex: —
- Qwen2.5 Plus 1127: 41.9 (#201)

| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Non-English | — | 1265 |
| LMArena Chinese | — | 1314 |
| LMArena German | — | 1231 |
| LMArena Japanese | — | 1207 |
| LMArena Russian | — | 1271 |

## Instruction Following

- GPT-5.3 Codex: —
- Qwen2.5 Plus 1127: 67.2 (#199)

| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Instruction Following | — | 1275 |

## Long Context

- GPT-5.3 Codex: —
- Qwen2.5 Plus 1127: 39.2 (#184)

| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Longer Query | — | 1292 |

## Writing & Preference

- GPT-5.3 Codex: —
- Qwen2.5 Plus 1127: 49.4 (#192)

| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Text | — | 1299 |
| LMArena Creative Writing | — | 1262 |
| LMArena Multi-Turn | — | 1299 |

## FAQ

### Is GPT-5.3 Codex better than Qwen2.5 Plus 1127?

GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 38.8 on the Noometry Index.

### Is GPT-5.3 Codex or Qwen2.5 Plus 1127 better for coding?

GPT-5.3 Codex scores higher on coding benchmarks: 48.6 versus 38.5 in the Noometry coding category.

### How many benchmarks do GPT-5.3 Codex and Qwen2.5 Plus 1127 share?

0 benchmarks have published results for both models. GPT-5.3 Codex has 8 scored results on Noometry and Qwen2.5 Plus 1127 has 14.