Model comparison
GPT-5.5 Pro vs Granite 4.0 H Small
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 35.9 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where GPT-5.5 Pro leads 83.8 to 29.3.
- Granite 4.0 H Small has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Granite 4.0 H Small | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 64.3 | 35.9 |
| Released | 2026-04-23 | — |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 14 | 19 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Granite 4.0 H Small: 35.8 (#207)
| Benchmark | GPT-5.5 Pro | Granite 4.0 H Small |
|---|---|---|
| LMArena Coding | — | 1247 |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.6 (#7), Granite 4.0 H Small: 23.4 (#164)
| Benchmark | GPT-5.5 Pro | Granite 4.0 H Small |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1240 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.45 | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 83.8 (#8), Granite 4.0 H Small: 29.3 (#219)
| Benchmark | GPT-5.5 Pro | Granite 4.0 H Small |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| Omni-MATH | — | 29.6% |
| LMArena Math | — | 1251 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.2 (#17), Granite 4.0 H Small: 31.5 (#210)
| Benchmark | GPT-5.5 Pro | Granite 4.0 H Small |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| MMLU-Pro | — | 56.9% |
| Vectara Hallucination Rate | — | 5.2% |
| GPQA (HELM) | — | 38.3% |
| LMArena Expert | — | 1244 |
Multilingual Not comparable
GPT-5.5 Pro: —, Granite 4.0 H Small: 38.7 (#223)
| Benchmark | GPT-5.5 Pro | Granite 4.0 H Small |
|---|---|---|
| LMArena Non-English | — | 1216 |
| LMArena Chinese | — | 1250 |
| LMArena Russian | — | 1198 |
| LMArena Spanish | — | 1258 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Granite 4.0 H Small: 68.9 (#178)
| Benchmark | GPT-5.5 Pro | Granite 4.0 H Small |
|---|---|---|
| IFEval | — | 89% |
| LMArena Instruction Following | — | 1221 |
Long Context Not comparable
GPT-5.5 Pro: —, Granite 4.0 H Small: 37.6 (#209)
| Benchmark | GPT-5.5 Pro | Granite 4.0 H Small |
|---|---|---|
| LMArena Longer Query | — | 1240 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Granite 4.0 H Small: 44.0 (#222)
| Benchmark | GPT-5.5 Pro | Granite 4.0 H Small |
|---|---|---|
| LMArena Text | — | 1241 |
| LMArena Creative Writing | — | 1210 |
| WildBench | — | 73.9% |
| LMArena Multi-Turn | — | 1243 |
Frequently asked questions
Is GPT-5.5 Pro better than Granite 4.0 H Small?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 35.9 on the Noometry Index.
How many benchmarks do GPT-5.5 Pro and Granite 4.0 H Small share?
0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Granite 4.0 H Small has 19.