Model comparison
GPT-5.5 Instant vs Granite 4.2 30b
GPT-5.5 Instant and Granite 4.2 30b score almost the same on the Noometry Index (42.7 vs 41.8), so choose on price, context window or the category you care about most.
Last verified . 11 shared benchmarks.
Summary
- They share 11 benchmarks with published results for both. GPT-5.5 Instant scores higher in 6 categories and Granite 4.2 30b in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 39.1.
- Granite 4.2 30b has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Instant | Granite 4.2 30b | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 42.7 | 41.8 |
| Released | 2026-05-05 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 27 | 11 |
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Category by category
Coding GPT-5.5 Instant leads
GPT-5.5 Instant: 44.3 (#74), Granite 4.2 30b: 41.0 (#126)
| Benchmark | GPT-5.5 Instant | Granite 4.2 30b |
|---|---|---|
| LMArena Coding | 1433 | 1396 |
| SciCode | 48.6% | — |
Reasoning Granite 4.2 30b leads
GPT-5.5 Instant: 24.9 (#155), Granite 4.2 30b: 27.8 (#112)
| Benchmark | GPT-5.5 Instant | Granite 4.2 30b |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1374 |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.52 | — |
Math Not comparable
GPT-5.5 Instant: 26.5 (#259), Granite 4.2 30b: —
| Benchmark | GPT-5.5 Instant | Granite 4.2 30b |
|---|---|---|
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
| LMArena Math | 1420 | — |
Knowledge GPT-5.5 Instant leads
GPT-5.5 Instant: 48.9 (#74), Granite 4.2 30b: 39.1 (#138)
| Benchmark | GPT-5.5 Instant | Granite 4.2 30b |
|---|---|---|
| LMArena Expert | 1409 | 1406 |
| GPQA Diamond | 82.5% | — |
Multimodal Not comparable
GPT-5.5 Instant: 40.0 (#52), Granite 4.2 30b: —
| Benchmark | GPT-5.5 Instant | Granite 4.2 30b |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |
Multilingual GPT-5.5 Instant leads
GPT-5.5 Instant: 52.8 (#80), Granite 4.2 30b: 47.3 (#151)
| Benchmark | GPT-5.5 Instant | Granite 4.2 30b |
|---|---|---|
| LMArena Non-English | 1417 | 1340 |
| LMArena Chinese | 1456 | 1414 |
| LMArena Russian | 1431 | 1343 |
| LMArena French | 1428 | — |
| LMArena German | 1411 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1392 | — |
| LMArena Spanish | 1429 | — |
Instruction Following GPT-5.5 Instant leads
GPT-5.5 Instant: 74.2 (#100), Granite 4.2 30b: 71.2 (#155)
| Benchmark | GPT-5.5 Instant | Granite 4.2 30b |
|---|---|---|
| LMArena Instruction Following | 1406 | 1347 |
Long Context GPT-5.5 Instant leads
GPT-5.5 Instant: 43.4 (#96), Granite 4.2 30b: 41.4 (#140)
| Benchmark | GPT-5.5 Instant | Granite 4.2 30b |
|---|---|---|
| LMArena Longer Query | 1422 | 1359 |
Writing & Preference GPT-5.5 Instant leads
GPT-5.5 Instant: 61.8 (#85), Granite 4.2 30b: 53.8 (#156)
| Benchmark | GPT-5.5 Instant | Granite 4.2 30b |
|---|---|---|
| LMArena Text | 1419 | 1361 |
| LMArena Creative Writing | 1419 | 1288 |
| LMArena Multi-Turn | 1433 | 1339 |
Frequently asked questions
Is GPT-5.5 Instant better than Granite 4.2 30b?
GPT-5.5 Instant and Granite 4.2 30b score almost the same on the Noometry Index (42.7 vs 41.8), so choose on price, context window or the category you care about most.
Is GPT-5.5 Instant or Granite 4.2 30b better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 41.0 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and Granite 4.2 30b share?
11 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Granite 4.2 30b has 11.