# GPT-5.3 Chat vs Nova 2.0 Pro Preview

> GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 32.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-nova-2-0-pro-preview
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where GPT-5.3 Chat leads 27.3 to 21.7.

## Snapshot

| | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 42.1 | 32.8 |
| Rank | 109 | 241 |
| Context | 128K | — |
| Input $/M | $1.75 | — |
| Output $/M | $14 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.3 Chat: 40.8 (#124)
- Nova 2.0 Pro Preview: 40.2 (#130)

| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| SciCode | — | 42.7% |
| LMArena Coding | 1408 | — |

## Agentic & Tool Use

- GPT-5.3 Chat: —
- Nova 2.0 Pro Preview: 21.9 (#127)

| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| GDP.pdf | — | 2% |

## Reasoning

- GPT-5.3 Chat: 27.3 (#105)
- Nova 2.0 Pro Preview: 21.7 (#189)

| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| CritPt | — | 0% |
| LMArena Hard Prompts | 1399 | — |

## Math

- GPT-5.3 Chat: 35.4 (#146)
- Nova 2.0 Pro Preview: —

| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Math | 1389 | — |

## Knowledge

- GPT-5.3 Chat: 38.2 (#137)
- Nova 2.0 Pro Preview: —

| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Expert | 1397 | — |

## Multilingual

- GPT-5.3 Chat: 50.5 (#119)
- Nova 2.0 Pro Preview: —

| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Non-English | 1383 | — |
| LMArena Chinese | 1433 | — |
| LMArena French | 1398 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1351 | — |
| LMArena Korean | 1347 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |

## Instruction Following

- GPT-5.3 Chat: 73.0 (#124)
- Nova 2.0 Pro Preview: —

| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Instruction Following | 1378 | — |

## Long Context

- GPT-5.3 Chat: 42.6 (#115)
- Nova 2.0 Pro Preview: —

| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Longer Query | 1396 | — |

## Writing & Preference

- GPT-5.3 Chat: 63.3 (#65)
- Nova 2.0 Pro Preview: —

| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1356 | — |
| EQ-Bench Creative Writing | 1690 | — |
| LMArena Multi-Turn | 1413 | — |

## FAQ

### Is GPT-5.3 Chat better than Nova 2.0 Pro Preview?

GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 32.8 on the Noometry Index.

### Is GPT-5.3 Chat or Nova 2.0 Pro Preview better for coding?

They score almost the same on coding (40.8 vs 40.2); test both on your own repository before choosing.

### How many benchmarks do GPT-5.3 Chat and Nova 2.0 Pro Preview share?

0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Nova 2.0 Pro Preview has 3.