# GPT-5.1-Codex vs Granite 4.0 H Small

> GPT-5.1-Codex is the stronger model overall, scoring 38.2 to 35.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-1-codex-vs-ibm-granite-h-small
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-5.1-Codex leads 41.7 to 35.8.
- Granite 4.0 H Small has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 38.2 | 35.9 |
| Rank | 178 | 213 |
| Context | 400K | — |
| Input $/M | $1.25 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.1-Codex: 41.7 (#107)
- Granite 4.0 H Small: 35.8 (#207)

| Benchmark | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| SWE-bench Verified (bash only) | 66% | — |
| LMArena WebDev | 1337 | — |
| LMArena Coding | — | 1247 |
| ALE-Bench | 1,245 | — |

## Agentic & Tool Use

- GPT-5.1-Codex: 37.8 (#32)
- Granite 4.0 H Small: —

| Benchmark | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| METR Time Horizons | 70.8% | — |

## Reasoning

- GPT-5.1-Codex: —
- Granite 4.0 H Small: 23.4 (#164)

| Benchmark | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| LMArena Hard Prompts | — | 1240 |

## Math

- GPT-5.1-Codex: 29.3 (#218)
- Granite 4.0 H Small: 29.3 (#219)

| Benchmark | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| ProofBench | 9% | — |
| Omni-MATH | — | 29.6% |
| LMArena Math | — | 1251 |

## Knowledge

- GPT-5.1-Codex: —
- Granite 4.0 H Small: 31.5 (#210)

| Benchmark | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| MMLU-Pro | — | 56.9% |
| Vectara Hallucination Rate | — | 5.2% |
| GPQA (HELM) | — | 38.3% |
| LMArena Expert | — | 1244 |

## Multilingual

- GPT-5.1-Codex: —
- Granite 4.0 H Small: 38.7 (#223)

| Benchmark | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| LMArena Non-English | — | 1216 |
| LMArena Chinese | — | 1250 |
| LMArena Russian | — | 1198 |
| LMArena Spanish | — | 1258 |

## Instruction Following

- GPT-5.1-Codex: —
- Granite 4.0 H Small: 68.9 (#178)

| Benchmark | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| IFEval | — | 89% |
| LMArena Instruction Following | — | 1221 |

## Long Context

- GPT-5.1-Codex: —
- Granite 4.0 H Small: 37.6 (#209)

| Benchmark | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| LMArena Longer Query | — | 1240 |

## Writing & Preference

- GPT-5.1-Codex: —
- Granite 4.0 H Small: 44.0 (#222)

| Benchmark | GPT-5.1-Codex | Granite 4.0 H Small |
|---|---|---|
| LMArena Text | — | 1241 |
| LMArena Creative Writing | — | 1210 |
| WildBench | — | 73.9% |
| LMArena Multi-Turn | — | 1243 |

## FAQ

### Is GPT-5.1-Codex better than Granite 4.0 H Small?

GPT-5.1-Codex is the stronger model overall, scoring 38.2 to 35.9 on the Noometry Index.

### Is GPT-5.1-Codex or Granite 4.0 H Small better for coding?

GPT-5.1-Codex scores higher on coding benchmarks: 41.7 versus 35.8 in the Noometry coding category.

### How many benchmarks do GPT-5.1-Codex and Granite 4.0 H Small share?

0 benchmarks have published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and Granite 4.0 H Small has 19.