# 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.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-granite-4-2-30b
- Last updated: 2026-10-10
- Shared benchmarks: 11

## 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.

## Snapshot

| | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 42.8 | 41.8 |
| Rank | 109 | 130 |
| Context | 128K | — |
| Input $/M | $1.75 | — |
| Output $/M | $14 | — |
| Weights | Proprietary | Open |

## Coding

- 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

- 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

- GPT-5.3 Chat: 38.2 (#142)
- Granite 4.2 30b: —

| Benchmark | GPT-5.3 Chat | Granite 4.2 30b |
|---|---|---|
| LMArena Math | 1389 | — |

## Knowledge

- 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: 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: 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: 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: 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 | — |

## FAQ

### 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.