Model comparison
GPT-5.5 Pro vs Granite 3.1 2b Instruct
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 33.2 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 22.0.
- Granite 3.1 2b Instruct has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Granite 3.1 2b Instruct | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 64.3 | 33.2 |
| 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 | 12 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
GPT-5.5 Pro: —, Granite 3.1 2b Instruct: 33.4 (#257)
| Benchmark | GPT-5.5 Pro | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Coding | — | 1149 |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), Granite 3.1 2b Instruct: 22.0 (#209)
| Benchmark | GPT-5.5 Pro | Granite 3.1 2b Instruct |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1138 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.07 | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 84.0 (#10), Granite 3.1 2b Instruct: 33.1 (#206)
| Benchmark | GPT-5.5 Pro | Granite 3.1 2b Instruct |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1159 |
| 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 3.1 2b Instruct: 30.8 (#224)
| Benchmark | GPT-5.5 Pro | Granite 3.1 2b Instruct |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| LMArena Expert | — | 1131 |
Multilingual Not comparable
GPT-5.5 Pro: —, Granite 3.1 2b Instruct: 29.1 (#269)
| Benchmark | GPT-5.5 Pro | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Non-English | — | 1068 |
| LMArena Chinese | — | 1139 |
| LMArena Russian | — | 1063 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Granite 3.1 2b Instruct: 57.7 (#264)
| Benchmark | GPT-5.5 Pro | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Instruction Following | — | 1116 |
Long Context Not comparable
GPT-5.5 Pro: —, Granite 3.1 2b Instruct: 35.0 (#244)
| Benchmark | GPT-5.5 Pro | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Longer Query | — | 1155 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Granite 3.1 2b Instruct: 34.1 (#274)
| Benchmark | GPT-5.5 Pro | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Text | — | 1127 |
| LMArena Creative Writing | — | 1116 |
| LMArena Multi-Turn | — | 1099 |
Frequently asked questions
Is GPT-5.5 Pro better than Granite 3.1 2b Instruct?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 33.2 on the Noometry Index.
How many benchmarks do GPT-5.5 Pro and Granite 3.1 2b Instruct share?
0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Granite 3.1 2b Instruct has 12.