# GPT-5.1-Codex vs Qwen1.5-7B

> GPT-5.1-Codex is the stronger model overall, scoring 38.2 to 30.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-1-codex-vs-qwen1-5-7b
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-5.1-Codex leads 41.7 to 31.6.
- Qwen1.5-7B has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 38.2 | 30.8 |
| Rank | 178 | 270 |
| Context | 400K | — |
| Input $/M | $1.25 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.1-Codex: 41.7 (#107)
- Qwen1.5-7B: 31.6 (#271)

| Benchmark | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| SWE-bench Verified (bash only) | 66% | — |
| LMArena WebDev | 1337 | — |
| LMArena Coding | — | 1107 |
| ALE-Bench | 1,245 | — |

## Agentic & Tool Use

- GPT-5.1-Codex: 37.8 (#32)
- Qwen1.5-7B: —

| Benchmark | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| METR Time Horizons | 70.8% | — |

## Reasoning

- GPT-5.1-Codex: —
- Qwen1.5-7B: 19.5 (#237)

| Benchmark | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| LMArena Hard Prompts | — | 1066 |

## Math

- GPT-5.1-Codex: 29.3 (#218)
- Qwen1.5-7B: 29.0 (#222)

| Benchmark | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| ProofBench | 9% | — |
| LMArena Math | — | 1080 |

## Knowledge

- GPT-5.1-Codex: —
- Qwen1.5-7B: 28.2 (#239)

| Benchmark | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| LMArena Expert | — | 1055 |
| MMLU | — | 62.6% |

## Multilingual

- GPT-5.1-Codex: —
- Qwen1.5-7B: 28.6 (#266)

| Benchmark | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| LMArena Non-English | — | 1058 |
| LMArena Chinese | — | 1140 |
| LMArena Russian | — | 1006 |

## Instruction Following

- GPT-5.1-Codex: —
- Qwen1.5-7B: 54.4 (#276)

| Benchmark | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| LMArena Instruction Following | — | 1058 |

## Long Context

- GPT-5.1-Codex: —
- Qwen1.5-7B: 33.1 (#261)

| Benchmark | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| LMArena Longer Query | — | 1090 |

## Writing & Preference

- GPT-5.1-Codex: —
- Qwen1.5-7B: 29.8 (#288)

| Benchmark | GPT-5.1-Codex | Qwen1.5-7B |
|---|---|---|
| LMArena Text | — | 1084 |
| LMArena Creative Writing | — | 1035 |
| LMArena Multi-Turn | — | 1061 |

## FAQ

### Is GPT-5.1-Codex better than Qwen1.5-7B?

GPT-5.1-Codex is the stronger model overall, scoring 38.2 to 30.8 on the Noometry Index.

### Is GPT-5.1-Codex or Qwen1.5-7B better for coding?

GPT-5.1-Codex scores higher on coding benchmarks: 41.7 versus 31.6 in the Noometry coding category.

### How many benchmarks do GPT-5.1-Codex and Qwen1.5-7B share?

0 benchmarks have published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and Qwen1.5-7B has 13.