# GPT-5.3 Codex vs Qwen3.6 Plus

> Qwen3.6 Plus is the stronger model overall, scoring 47.5 to 45.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-3-codex-vs-qwen3-6-plus
- Last updated: 2026-10-10
- Shared benchmarks: 5

## Summary

- They share 5 benchmarks with published results for both. GPT-5.3 Codex scores higher in 1 category and Qwen3.6 Plus in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in coding, where GPT-5.3 Codex leads 48.6 to 40.8.
- The biggest single-benchmark swing is SWE-bench Verified: 74.8% for GPT-5.3 Codex and 57.9% for Qwen3.6 Plus.
- Qwen3.6 Plus is cheaper at $0.50 / $3 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Codex.
- Qwen3.6 Plus accepts more context: 1M tokens versus 400K.

## Snapshot

| | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 45.8 | 47.5 |
| Rank | 69 | 62 |
| Context | 400K | 1M |
| Input $/M | $1.75 | $0.50 |
| Output $/M | $14 | $3 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.3 Codex: 48.6 (#56)
- Qwen3.6 Plus: 40.8 (#130)

| Benchmark | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| SWE-bench Verified | 74.8% | 57.9% |
| LMArena WebDev | 1409 | 1461 |
| ALE-Bench | 1,655 | 670.15 |
| SciCode | — | 40.7% |
| WeirdML | 79.3% | — |
| LMArena Coding | — | 1467 |

## Agentic & Tool Use

- GPT-5.3 Codex: 48.0 (#9)
- Qwen3.6 Plus: —

| Benchmark | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| Vending-Bench 2 | 5,940 | 5,115 |
| Terminal-Bench | 78.4% | — |
| METR Time Horizons | 74.5% | — |

## Reasoning

- GPT-5.3 Codex: —
- Qwen3.6 Plus: 29.3 (#93)

| Benchmark | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| Epoch Capabilities Index | 156.77 | 147.65 |
| NYT Connections (extended) | — | 60.3% |
| CritPt | — | 2.9% |
| Chess Puzzles | — | 17% |
| Thematic Generalization | — | 59.5% |
| LMArena Hard Prompts | — | 1449 |
| Mystery Game Puzzles | — | 12% |
| DTBench | — | 81.9% |
| LMCA | — | 33.1% |

## Math

- GPT-5.3 Codex: —
- Qwen3.6 Plus: 51.8 (#54)

| Benchmark | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 38.2% |
| OTIS Mock AIME 2024-2025 | — | 93.3% |
| LMArena Math | — | 1450 |
| FrontierMath (Feb 2025 set) | — | 26.2% |
| FrontierMath Tier 4 (v1) | — | 8.3% |

## Knowledge

- GPT-5.3 Codex: —
- Qwen3.6 Plus: 56.1 (#45)

| Benchmark | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| GPQA Diamond | — | 88.4% |
| SimpleQA Verified | — | 44.1% |
| LMArena Expert | — | 1454 |

## Multilingual

- GPT-5.3 Codex: —
- Qwen3.6 Plus: 53.3 (#70)

| Benchmark | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| LMArena Non-English | — | 1424 |
| LMArena Chinese | — | 1477 |
| LMArena French | — | 1455 |
| LMArena German | — | 1452 |
| LMArena Japanese | — | 1389 |
| LMArena Korean | — | 1379 |
| LMArena Russian | — | 1434 |
| LMArena Spanish | — | 1432 |

## Instruction Following

- GPT-5.3 Codex: —
- Qwen3.6 Plus: 75.0 (#74)

| Benchmark | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| LMArena Instruction Following | — | 1425 |

## Long Context

- GPT-5.3 Codex: —
- Qwen3.6 Plus: 45.2 (#49)

| Benchmark | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| CL-bench | — | 20.3% |
| LMArena Longer Query | — | 1439 |

## Writing & Preference

- GPT-5.3 Codex: —
- Qwen3.6 Plus: 62.2 (#82)

| Benchmark | GPT-5.3 Codex | Qwen3.6 Plus |
|---|---|---|
| LMArena Text | — | 1437 |
| LMArena Creative Writing | — | 1404 |
| LMArena Multi-Turn | — | 1438 |

## FAQ

### Is GPT-5.3 Codex better than Qwen3.6 Plus?

Qwen3.6 Plus is the stronger model overall, scoring 47.5 to 45.8 on the Noometry Index.

### Which is cheaper, GPT-5.3 Codex or Qwen3.6 Plus?

Qwen3.6 Plus is cheaper. It lists at $0.50 per million input tokens and $3 per million output tokens; GPT-5.3 Codex lists at $1.75 and $14.

### Is GPT-5.3 Codex or Qwen3.6 Plus better for coding?

GPT-5.3 Codex scores higher on coding benchmarks: 48.6 versus 40.8 in the Noometry coding category.

### Which has the bigger context window?

Qwen3.6 Plus does, with 1M tokens against 400K.

### How many benchmarks do GPT-5.3 Codex and Qwen3.6 Plus share?

5 benchmarks have published results for both models. GPT-5.3 Codex has 8 scored results on Noometry and Qwen3.6 Plus has 37.