# GPT-5-Codex vs Qwen Plus

> GPT-5-Codex and Qwen Plus score almost the same on the Noometry Index (37.9 vs 37.1), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gpt-5-codex-vs-qwen-plus
- Last updated: 2026-10-11
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GPT-5-Codex scores higher in 2 categories and Qwen Plus in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in coding, where GPT-5-Codex leads 42.4 to 38.9.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 70.3% for GPT-5-Codex and 63.3% for Qwen Plus.
- Qwen Plus is cheaper at $0.40 / $1.20 per million input/output tokens, against $1.25 / $10 for GPT-5-Codex.
- Qwen Plus accepts more context: 1M tokens versus 400K.

## Snapshot

| | GPT-5-Codex | Qwen Plus |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 37.9 | 37.1 |
| Rank | 192 | 210 |
| Context | 400K | 1M |
| Input $/M | $1.25 | $0.40 |
| Output $/M | $10 | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5-Codex: 42.4 (#103)
- Qwen Plus: 38.9 (#167)

| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| WeirdML | 54.5% | — |
| LMArena Coding | — | 1328 |

## Agentic & Tool Use

- GPT-5-Codex: 31.0 (#72)
- Qwen Plus: —

| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| Terminal-Bench | 44.3% | — |

## Reasoning

- GPT-5-Codex: 30.9 (#83)
- Qwen Plus: 28.4 (#107)

| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| Kagi LLM Benchmark | 70.3% | 63.3% |
| LMArena Hard Prompts | — | 1317 |
| DTBench | — | 81.1% |
| LMCA | — | 24% |

## Math

- GPT-5-Codex: —
- Qwen Plus: 23.3 (#271)

| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 17.8% |
| LMArena Math | — | 1326 |
| MATH Level 5 | — | 65.3% |
| FrontierMath (Feb 2025 set) | — | 1.7% |

## Knowledge

- GPT-5-Codex: —
- Qwen Plus: 27.4 (#251)

| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| GPQA Diamond | — | 48.1% |
| LMArena Expert | — | 1328 |

## Multilingual

- GPT-5-Codex: —
- Qwen Plus: 45.1 (#175)

| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| LMArena Non-English | — | 1310 |
| LMArena Chinese | — | 1347 |
| LMArena Japanese | — | 1251 |
| LMArena Russian | — | 1323 |

## Instruction Following

- GPT-5-Codex: —
- Qwen Plus: 68.8 (#181)

| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| LMArena Instruction Following | — | 1303 |

## Long Context

- GPT-5-Codex: —
- Qwen Plus: 40.3 (#158)

| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| LMArena Longer Query | — | 1324 |

## Writing & Preference

- GPT-5-Codex: —
- Qwen Plus: 52.2 (#176)

| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| LMArena Text | — | 1326 |
| LMArena Creative Writing | — | 1293 |
| LMArena Multi-Turn | — | 1336 |

## FAQ

### Is GPT-5-Codex better than Qwen Plus?

GPT-5-Codex and Qwen Plus score almost the same on the Noometry Index (37.9 vs 37.1), so choose on price, context window or the category you care about most.

### Which is cheaper, GPT-5-Codex or Qwen Plus?

Qwen Plus is cheaper. It lists at $0.40 per million input tokens and $1.20 per million output tokens; GPT-5-Codex lists at $1.25 and $10.

### Is GPT-5-Codex or Qwen Plus better for coding?

GPT-5-Codex scores higher on coding benchmarks: 42.4 versus 38.9 in the Noometry coding category.

### Which has the bigger context window?

Qwen Plus does, with 1M tokens against 400K.

### How many benchmarks do GPT-5-Codex and Qwen Plus share?

1 benchmark has published results for both models. GPT-5-Codex has 3 scored results on Noometry and Qwen Plus has 20.