Model comparison
GPT-5.5 Instant vs Granite 4.0 H Small
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 36.5 on the Noometry Index.
Last verified . 13 shared benchmarks.
Summary
- They share 13 benchmarks with published results for both. GPT-5.5 Instant scores higher in 7 categories and Granite 4.0 H Small in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.5 Instant leads 61.8 to 43.8.
- Granite 4.0 H Small has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Instant | Granite 4.0 H Small | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 42.7 | 36.5 |
| Released | 2026-05-05 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 27 | 19 |
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Category by category
Coding GPT-5.5 Instant leads
GPT-5.5 Instant: 44.3 (#74), Granite 4.0 H Small: 36.4 (#209)
| Benchmark | GPT-5.5 Instant | Granite 4.0 H Small |
|---|---|---|
| LMArena Coding | 1433 | 1249 |
| SciCode | 48.6% | — |
Reasoning Too close to call
GPT-5.5 Instant: 24.9 (#155), Granite 4.0 H Small: 24.4 (#163)
| Benchmark | GPT-5.5 Instant | Granite 4.0 H Small |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1240 |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.52 | — |
Math Granite 4.0 H Small leads
GPT-5.5 Instant: 26.5 (#259), Granite 4.0 H Small: 31.4 (#223)
| Benchmark | GPT-5.5 Instant | Granite 4.0 H Small |
|---|---|---|
| LMArena Math | 1420 | 1247 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
| Omni-MATH | — | 29.6% |
Knowledge GPT-5.5 Instant leads
GPT-5.5 Instant: 48.9 (#74), Granite 4.0 H Small: 32.0 (#215)
| Benchmark | GPT-5.5 Instant | Granite 4.0 H Small |
|---|---|---|
| LMArena Expert | 1409 | 1251 |
| GPQA Diamond | 82.5% | — |
| MMLU-Pro | — | 56.9% |
| Vectara Hallucination Rate | — | 5.2% |
| GPQA (HELM) | — | 38.3% |
Multimodal Not comparable
GPT-5.5 Instant: 40.0 (#52), Granite 4.0 H Small: —
| Benchmark | GPT-5.5 Instant | Granite 4.0 H Small |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |
Multilingual GPT-5.5 Instant leads
GPT-5.5 Instant: 52.8 (#80), Granite 4.0 H Small: 38.6 (#228)
| Benchmark | GPT-5.5 Instant | Granite 4.0 H Small |
|---|---|---|
| LMArena Non-English | 1417 | 1216 |
| LMArena Chinese | 1456 | 1249 |
| LMArena Russian | 1431 | 1201 |
| LMArena Spanish | 1429 | 1258 |
| LMArena French | 1428 | — |
| LMArena German | 1411 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1392 | — |
Instruction Following GPT-5.5 Instant leads
GPT-5.5 Instant: 74.2 (#100), Granite 4.0 H Small: 68.7 (#183)
| Benchmark | GPT-5.5 Instant | Granite 4.0 H Small |
|---|---|---|
| LMArena Instruction Following | 1406 | 1222 |
| IFEval | — | 89% |
Long Context GPT-5.5 Instant leads
GPT-5.5 Instant: 43.4 (#96), Granite 4.0 H Small: 37.7 (#213)
| Benchmark | GPT-5.5 Instant | Granite 4.0 H Small |
|---|---|---|
| LMArena Longer Query | 1422 | 1242 |
Writing & Preference GPT-5.5 Instant leads
GPT-5.5 Instant: 61.8 (#85), Granite 4.0 H Small: 43.8 (#227)
| Benchmark | GPT-5.5 Instant | Granite 4.0 H Small |
|---|---|---|
| LMArena Text | 1419 | 1241 |
| LMArena Creative Writing | 1419 | 1211 |
| LMArena Multi-Turn | 1433 | 1242 |
| WildBench | — | 73.9% |
Frequently asked questions
Is GPT-5.5 Instant better than Granite 4.0 H Small?
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 36.5 on the Noometry Index.
Is GPT-5.5 Instant or Granite 4.0 H Small better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 36.4 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and Granite 4.0 H Small share?
13 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Granite 4.0 H Small has 19.