# GPT-5.1-Codex vs Wizardlm 13b

> 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-wizardlm-13b
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-5.1-Codex leads 41.7 to 29.6.
- Wizardlm 13b has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.1-Codex | Wizardlm 13b |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 38.2 | 30.8 |
| Rank | 178 | 272 |
| Context | 400K | — |
| Input $/M | $1.25 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.1-Codex: 41.7 (#107)
- Wizardlm 13b: 29.6 (#293)

| Benchmark | GPT-5.1-Codex | Wizardlm 13b |
|---|---|---|
| SWE-bench Verified (bash only) | 66% | — |
| LMArena WebDev | 1337 | — |
| LMArena Coding | — | 1035 |
| ALE-Bench | 1,245 | — |

## Agentic & Tool Use

- GPT-5.1-Codex: 37.8 (#32)
- Wizardlm 13b: —

| Benchmark | GPT-5.1-Codex | Wizardlm 13b |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| METR Time Horizons | 70.8% | — |

## Reasoning

- GPT-5.1-Codex: —
- Wizardlm 13b: 18.5 (#265)

| Benchmark | GPT-5.1-Codex | Wizardlm 13b |
|---|---|---|
| LMArena Hard Prompts | — | 1018 |

## Math

- GPT-5.1-Codex: 29.3 (#218)
- Wizardlm 13b: 27.8 (#235)

| Benchmark | GPT-5.1-Codex | Wizardlm 13b |
|---|---|---|
| ProofBench | 9% | — |
| LMArena Math | — | 1017 |

## Multilingual

- GPT-5.1-Codex: —
- Wizardlm 13b: 27.3 (#272)

| Benchmark | GPT-5.1-Codex | Wizardlm 13b |
|---|---|---|
| LMArena Non-English | — | 1034 |
| LMArena Chinese | — | 1023 |

## Instruction Following

- GPT-5.1-Codex: —
- Wizardlm 13b: 53.7 (#280)

| Benchmark | GPT-5.1-Codex | Wizardlm 13b |
|---|---|---|
| LMArena Instruction Following | — | 1049 |

## Long Context

- GPT-5.1-Codex: —
- Wizardlm 13b: 32.0 (#268)

| Benchmark | GPT-5.1-Codex | Wizardlm 13b |
|---|---|---|
| LMArena Longer Query | — | 1054 |

## Writing & Preference

- GPT-5.1-Codex: —
- Wizardlm 13b: 30.7 (#282)

| Benchmark | GPT-5.1-Codex | Wizardlm 13b |
|---|---|---|
| LMArena Text | — | 1077 |
| LMArena Creative Writing | — | 1090 |
| LMArena Multi-Turn | — | 1047 |

## FAQ

### Is GPT-5.1-Codex better than Wizardlm 13b?

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 Wizardlm 13b better for coding?

GPT-5.1-Codex scores higher on coding benchmarks: 41.7 versus 29.6 in the Noometry coding category.

### How many benchmarks do GPT-5.1-Codex and Wizardlm 13b share?

0 benchmarks have published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and Wizardlm 13b has 10.