# GPT-5.1-Codex vs Qwen3 Max

> Qwen3 Max is the stronger model overall, scoring 43.5 to 38.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-1-codex-vs-qwen3-max
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GPT-5.1-Codex scores higher in 0 categories and Qwen3 Max in 2 categories; one gap is clear of the uncertainty.
- The widest gap is in math, where Qwen3 Max leads 37.6 to 29.3.
- Qwen3 Max is cheaper at $1.20 / $6 per million input/output tokens, against $1.25 / $10 for GPT-5.1-Codex.
- GPT-5.1-Codex accepts more context: 400K tokens versus 262K.

## Snapshot

| | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 38.2 | 43.5 |
| Rank | 178 | 82 |
| Context | 400K | 262K |
| Input $/M | $1.25 | $1.20 |
| Output $/M | $10 | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.1-Codex: 41.7 (#107)
- Qwen3 Max: 42.4 (#93)

| Benchmark | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| ALE-Bench | 1,245 | 370.45 |
| SWE-bench Verified (bash only) | 66% | — |
| LMArena WebDev | 1337 | — |
| LMArena Coding | — | 1456 |

## Agentic & Tool Use

- GPT-5.1-Codex: 37.8 (#32)
- Qwen3 Max: —

| Benchmark | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| METR Time Horizons | 70.8% | — |
| Vending-Bench 2 | — | 71.56 |

## Reasoning

- GPT-5.1-Codex: —
- Qwen3 Max: 22.0 (#186)

| Benchmark | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| Kagi LLM Benchmark | — | 72.5% |
| NYT Connections (extended) | — | 30.1% |
| Chess Puzzles | — | 4% |
| LMArena Hard Prompts | — | 1448 |
| Mystery Game Puzzles | — | 5% |
| DTBench | — | 82.1% |
| LMCA | — | 28.3% |
| Epoch Capabilities Index | — | 142.41 |

## Math

- GPT-5.1-Codex: 29.3 (#218)
- Qwen3 Max: 37.6 (#94)

| Benchmark | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 18.9% |
| OTIS Mock AIME 2024-2025 | — | 73.3% |
| ProofBench | 9% | — |
| LMArena Math | — | 1447 |
| MATH Level 5 | — | 97.1% |

## Knowledge

- GPT-5.1-Codex: —
- Qwen3 Max: 48.1 (#72)

| Benchmark | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| GPQA Diamond | — | 72.6% |
| SimpleQA Verified | — | 48.7% |
| LMArena Expert | — | 1457 |

## Multilingual

- GPT-5.1-Codex: —
- Qwen3 Max: 53.9 (#58)

| Benchmark | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| LMArena Non-English | — | 1429 |
| LMArena Chinese | — | 1479 |
| LMArena French | — | 1450 |
| LMArena German | — | 1463 |
| LMArena Japanese | — | 1399 |
| LMArena Korean | — | 1397 |
| LMArena Russian | — | 1428 |
| LMArena Spanish | — | 1463 |

## Instruction Following

- GPT-5.1-Codex: —
- Qwen3 Max: 75.0 (#81)

| Benchmark | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| LMArena Instruction Following | — | 1420 |

## Long Context

- GPT-5.1-Codex: —
- Qwen3 Max: 41.6 (#129)

| Benchmark | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| Fiction.LiveBench | — | 66.7% |
| CL-bench | — | 14.5% |
| LMArena Longer Query | — | 1439 |

## Writing & Preference

- GPT-5.1-Codex: —
- Qwen3 Max: 62.6 (#72)

| Benchmark | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| LMArena Text | — | 1439 |
| LMArena Creative Writing | — | 1401 |
| LMArena Multi-Turn | — | 1446 |

## FAQ

### Is GPT-5.1-Codex better than Qwen3 Max?

Qwen3 Max is the stronger model overall, scoring 43.5 to 38.2 on the Noometry Index.

### Which is cheaper, GPT-5.1-Codex or Qwen3 Max?

Qwen3 Max is cheaper. It lists at $1.20 per million input tokens and $6 per million output tokens; GPT-5.1-Codex lists at $1.25 and $10.

### Is GPT-5.1-Codex or Qwen3 Max better for coding?

They score almost the same on coding (41.7 vs 42.4); test both on your own repository before choosing.

### Which has the bigger context window?

GPT-5.1-Codex does, with 400K tokens against 262K.

### How many benchmarks do GPT-5.1-Codex and Qwen3 Max share?

1 benchmark has published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and Qwen3 Max has 33.