Model comparison
GPT-5.5 Pro vs Granite 4.2 30b
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 41.8 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where GPT-5.5 Pro leads 73.3 to 27.8.
- Granite 4.2 30b has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Granite 4.2 30b | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 64.3 | 41.8 |
| 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 | 11 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Granite 4.2 30b: 41.0 (#126)
| Benchmark | GPT-5.5 Pro | Granite 4.2 30b |
|---|---|---|
| LMArena Coding | — | 1396 |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), Granite 4.2 30b: 27.8 (#112)
| Benchmark | GPT-5.5 Pro | Granite 4.2 30b |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1374 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.07 | — |
Math Not comparable
GPT-5.5 Pro: 84.0 (#10), Granite 4.2 30b: —
| Benchmark | GPT-5.5 Pro | Granite 4.2 30b |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.1 (#19), Granite 4.2 30b: 39.1 (#138)
| Benchmark | GPT-5.5 Pro | Granite 4.2 30b |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| LMArena Expert | — | 1406 |
Multilingual Not comparable
GPT-5.5 Pro: —, Granite 4.2 30b: 47.3 (#151)
| Benchmark | GPT-5.5 Pro | Granite 4.2 30b |
|---|---|---|
| LMArena Non-English | — | 1340 |
| LMArena Chinese | — | 1414 |
| LMArena Russian | — | 1343 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Granite 4.2 30b: 71.2 (#155)
| Benchmark | GPT-5.5 Pro | Granite 4.2 30b |
|---|---|---|
| LMArena Instruction Following | — | 1347 |
Long Context Not comparable
GPT-5.5 Pro: —, Granite 4.2 30b: 41.4 (#140)
| Benchmark | GPT-5.5 Pro | Granite 4.2 30b |
|---|---|---|
| LMArena Longer Query | — | 1359 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Granite 4.2 30b: 53.8 (#156)
| Benchmark | GPT-5.5 Pro | Granite 4.2 30b |
|---|---|---|
| LMArena Text | — | 1361 |
| LMArena Creative Writing | — | 1288 |
| LMArena Multi-Turn | — | 1339 |
Frequently asked questions
Is GPT-5.5 Pro better than Granite 4.2 30b?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 41.8 on the Noometry Index.
How many benchmarks do GPT-5.5 Pro and Granite 4.2 30b share?
0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Granite 4.2 30b has 11.