Model comparison
GPT-5-Codex vs Granite 4.0 H Small
GPT-5-Codex is the stronger model overall, scoring 37.9 to 36.5 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where GPT-5-Codex leads 30.9 to 24.4.
- Granite 4.0 H Small has downloadable open weights; the other is API-only.
Side by side
| GPT-5-Codex | Granite 4.0 H Small | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 37.9 | 36.5 |
| Released | 2025-09-15 | — |
| Weights | Proprietary | Open |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 3 | 19 |
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Category by category
Coding GPT-5-Codex leads
GPT-5-Codex: 42.4 (#103), Granite 4.0 H Small: 36.4 (#209)
| Benchmark | GPT-5-Codex | Granite 4.0 H Small |
|---|---|---|
| WeirdML | 54.5% | — |
| LMArena Coding | — | 1249 |
Agentic & Tool Use Not comparable
GPT-5-Codex: 31.0 (#72), Granite 4.0 H Small: —
| Benchmark | GPT-5-Codex | Granite 4.0 H Small |
|---|---|---|
| Terminal-Bench | 44.3% | — |
Reasoning GPT-5-Codex leads
GPT-5-Codex: 30.9 (#83), Granite 4.0 H Small: 24.4 (#163)
| Benchmark | GPT-5-Codex | Granite 4.0 H Small |
|---|---|---|
| Kagi LLM Benchmark | 70.3% | — |
| LMArena Hard Prompts | — | 1240 |
Math Not comparable
GPT-5-Codex: —, Granite 4.0 H Small: 31.4 (#223)
| Benchmark | GPT-5-Codex | Granite 4.0 H Small |
|---|---|---|
| Omni-MATH | — | 29.6% |
| LMArena Math | — | 1247 |
Knowledge Not comparable
GPT-5-Codex: —, Granite 4.0 H Small: 32.0 (#215)
| Benchmark | GPT-5-Codex | Granite 4.0 H Small |
|---|---|---|
| MMLU-Pro | — | 56.9% |
| Vectara Hallucination Rate | — | 5.2% |
| GPQA (HELM) | — | 38.3% |
| LMArena Expert | — | 1251 |
Multilingual Not comparable
GPT-5-Codex: —, Granite 4.0 H Small: 38.6 (#228)
| Benchmark | GPT-5-Codex | Granite 4.0 H Small |
|---|---|---|
| LMArena Non-English | — | 1216 |
| LMArena Chinese | — | 1249 |
| LMArena Russian | — | 1201 |
| LMArena Spanish | — | 1258 |
Instruction Following Not comparable
GPT-5-Codex: —, Granite 4.0 H Small: 68.7 (#183)
| Benchmark | GPT-5-Codex | Granite 4.0 H Small |
|---|---|---|
| IFEval | — | 89% |
| LMArena Instruction Following | — | 1222 |
Long Context Not comparable
GPT-5-Codex: —, Granite 4.0 H Small: 37.7 (#213)
| Benchmark | GPT-5-Codex | Granite 4.0 H Small |
|---|---|---|
| LMArena Longer Query | — | 1242 |
Writing & Preference Not comparable
GPT-5-Codex: —, Granite 4.0 H Small: 43.8 (#227)
| Benchmark | GPT-5-Codex | Granite 4.0 H Small |
|---|---|---|
| LMArena Text | — | 1241 |
| LMArena Creative Writing | — | 1211 |
| WildBench | — | 73.9% |
| LMArena Multi-Turn | — | 1242 |
Frequently asked questions
Is GPT-5-Codex better than Granite 4.0 H Small?
GPT-5-Codex is the stronger model overall, scoring 37.9 to 36.5 on the Noometry Index.
Is GPT-5-Codex or Granite 4.0 H Small better for coding?
GPT-5-Codex scores higher on coding benchmarks: 42.4 versus 36.4 in the Noometry coding category.
How many benchmarks do GPT-5-Codex and Granite 4.0 H Small share?
0 benchmarks have published results for both models. GPT-5-Codex has 3 scored results on Noometry and Granite 4.0 H Small has 19.