Model comparison
GPT-5.5 Instant vs Granite 3.1 2b Instruct
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 32.6 on the Noometry Index.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. GPT-5.5 Instant scores higher in 7 categories and Granite 3.1 2b Instruct in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.5 Instant leads 62.0 to 34.3.
- Granite 3.1 2b Instruct has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Instant | Granite 3.1 2b Instruct | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 42.5 | 32.6 |
| Released | 2026-05-05 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 27 | 12 |
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Category by category
Coding GPT-5.5 Instant leads
GPT-5.5 Instant: 43.7 (#73), Granite 3.1 2b Instruct: 32.9 (#255)
| Benchmark | GPT-5.5 Instant | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Coding | 1433 | 1149 |
| SciCode | 48.6% | — |
Reasoning GPT-5.5 Instant leads
GPT-5.5 Instant: 24.2 (#149), Granite 3.1 2b Instruct: 21.0 (#206)
| Benchmark | GPT-5.5 Instant | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1138 |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.48 | — |
Math Granite 3.1 2b Instruct leads
GPT-5.5 Instant: 26.1 (#241), Granite 3.1 2b Instruct: 30.6 (#206)
| Benchmark | GPT-5.5 Instant | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Math | 1420 | 1159 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
Knowledge GPT-5.5 Instant leads
GPT-5.5 Instant: 48.9 (#68), Granite 3.1 2b Instruct: 30.3 (#223)
| Benchmark | GPT-5.5 Instant | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Expert | 1409 | 1131 |
| GPQA Diamond | 82.5% | — |
Multimodal Not comparable
GPT-5.5 Instant: 39.3 (#48), Granite 3.1 2b Instruct: —
| Benchmark | GPT-5.5 Instant | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |
Multilingual GPT-5.5 Instant leads
GPT-5.5 Instant: 53.0 (#76), Granite 3.1 2b Instruct: 29.2 (#264)
| Benchmark | GPT-5.5 Instant | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Non-English | 1417 | 1068 |
| LMArena Chinese | 1457 | 1138 |
| LMArena Russian | 1430 | 1063 |
| LMArena French | 1428 | — |
| LMArena German | 1410 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1393 | — |
| LMArena Spanish | 1430 | — |
Instruction Following GPT-5.5 Instant leads
GPT-5.5 Instant: 74.4 (#94), Granite 3.1 2b Instruct: 58.0 (#259)
| Benchmark | GPT-5.5 Instant | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Instruction Following | 1407 | 1116 |
Long Context GPT-5.5 Instant leads
GPT-5.5 Instant: 43.4 (#92), Granite 3.1 2b Instruct: 35.0 (#239)
| Benchmark | GPT-5.5 Instant | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Longer Query | 1422 | 1155 |
Writing & Preference GPT-5.5 Instant leads
GPT-5.5 Instant: 62.0 (#81), Granite 3.1 2b Instruct: 34.3 (#269)
| Benchmark | GPT-5.5 Instant | Granite 3.1 2b Instruct |
|---|---|---|
| LMArena Text | 1419 | 1127 |
| LMArena Creative Writing | 1420 | 1116 |
| LMArena Multi-Turn | 1434 | 1099 |
Frequently asked questions
Is GPT-5.5 Instant better than Granite 3.1 2b Instruct?
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 32.6 on the Noometry Index.
Is GPT-5.5 Instant or Granite 3.1 2b Instruct better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 32.9 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and Granite 3.1 2b Instruct share?
12 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Granite 3.1 2b Instruct has 12.