Model comparison
GPT-5.3 Chat vs Granite 4.2 30b
GPT-5.3 Chat and Granite 4.2 30b score almost the same on the Noometry Index (42.8 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-5.3 Chat scores higher in 6 categories and Granite 4.2 30b in 1 category; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 53.8.
- Granite 4.2 30b has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | Granite 4.2 30b | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 42.8 | 41.8 |
| Released | 2026-03-03 | — |
| Weights | Proprietary | Open |
| Context window | 128K | — |
| Max output | 16K | — |
| Input $ / M tokens | $1.75 | — |
| Output $ / M tokens | $14 | — |
| Results tracked | 18 | 11 |
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Category by category
Coding Too close to call
GPT-5.3 Chat: 41.4 (#124), Granite 4.2 30b: 41.0 (#126)
| Benchmark | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| LMArena Coding | 1408 | 1396 |
Reasoning Too close to call
GPT-5.3 Chat: 28.5 (#102), Granite 4.2 30b: 27.8 (#112)
| Benchmark | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1374 |
Math Not comparable
GPT-5.3 Chat: 38.2 (#142), Granite 4.2 30b: —
| Benchmark | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| LMArena Math | 1389 | — |
Knowledge Too close to call
GPT-5.3 Chat: 38.8 (#140), Granite 4.2 30b: 39.1 (#138)
| Benchmark | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| LMArena Expert | 1397 | 1406 |
Multilingual GPT-5.3 Chat leads
GPT-5.3 Chat: 50.3 (#124), Granite 4.2 30b: 47.3 (#151)
| Benchmark | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| LMArena Non-English | 1382 | 1340 |
| LMArena Chinese | 1432 | 1414 |
| LMArena Russian | 1400 | 1343 |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Spanish | 1371 | — |
Instruction Following GPT-5.3 Chat leads
GPT-5.3 Chat: 72.8 (#129), Granite 4.2 30b: 71.2 (#155)
| Benchmark | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| LMArena Instruction Following | 1378 | 1347 |
Long Context GPT-5.3 Chat leads
GPT-5.3 Chat: 42.6 (#120), Granite 4.2 30b: 41.4 (#140)
| Benchmark | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| LMArena Longer Query | 1396 | 1359 |
Writing & Preference GPT-5.3 Chat leads
GPT-5.3 Chat: 63.1 (#68), Granite 4.2 30b: 53.8 (#156)
| Benchmark | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| LMArena Text | 1389 | 1361 |
| LMArena Creative Writing | 1355 | 1288 |
| LMArena Multi-Turn | 1412 | 1339 |
| EQ-Bench Creative Writing | 1690 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Granite 4.2 30b?
GPT-5.3 Chat and Granite 4.2 30b score almost the same on the Noometry Index (42.8 vs 41.8), so choose on price, context window or the category you care about most.
Is GPT-5.3 Chat or Granite 4.2 30b better for coding?
They score almost the same on coding (41.4 vs 41.0); test both on your own repository before choosing.
How many benchmarks do GPT-5.3 Chat and Granite 4.2 30b share?
11 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Granite 4.2 30b has 11.