# Amazon Nova Pro vs GPT-5.3 Chat

> GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 31.0 on the Noometry Index. Amazon Nova Pro costs 3.4× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/amazon-nova-pro-vs-gpt-5-3-chat
- Last updated: 2026-10-12
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Amazon Nova Pro scores higher in 0 categories and GPT-5.3 Chat in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 43.9.
- Amazon Nova Pro is cheaper at $0.80 / $3.20 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- Amazon Nova Pro accepts more context: 300K tokens versus 128K.

## Snapshot

| | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 31.0 | 42.8 |
| Rank | 281 | 109 |
| Context | 300K | 128K |
| Input $/M | $0.80 | $1.75 |
| Output $/M | $3.20 | $14 |
| Weights | Proprietary | Proprietary |

## Coding

- Amazon Nova Pro: 35.1 (#229)
- GPT-5.3 Chat: 41.4 (#124)

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1270 | 1408 |
| LiveBench Coding | 38.1% | — |

## Agentic & Tool Use

- Amazon Nova Pro: 16.7 (#147)
- GPT-5.3 Chat: —

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| Berkeley Function Calling Leaderboard | 25% | — |
| TheAgentCompany | 1.7% | — |

## Reasoning

- Amazon Nova Pro: 20.0 (#243)
- GPT-5.3 Chat: 28.5 (#102)

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1246 | 1399 |
| LiveBench Reasoning | 32.6% | — |
| LiveBench Data Analysis | 48.3% | — |
| Epoch Capabilities Index | 123.8 | — |
| LiveBench | 43.5% | — |

## Math

- Amazon Nova Pro: 28.5 (#243)
- GPT-5.3 Chat: 38.2 (#142)

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1252 | 1389 |
| Omni-MATH | 24.2% | — |
| LiveBench Math | 38% | — |

## Knowledge

- Amazon Nova Pro: 27.4 (#250)
- GPT-5.3 Chat: 38.8 (#140)

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1211 | 1397 |
| Humanity's Last Exam | 4.4% | — |
| MMLU-Pro | 67.3% | — |
| Confabulations | 30.1% | — |
| Vectara Hallucination Rate | 5.1% | — |
| GPQA (HELM) | 44.6% | — |
| MMLU | 82% | — |

## Multimodal

- Amazon Nova Pro: 25.0 (#126)
- GPT-5.3 Chat: —

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Vision | 980 | — |

## Multilingual

- Amazon Nova Pro: 39.7 (#223)
- GPT-5.3 Chat: 50.3 (#124)

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1234 | 1382 |
| LMArena Chinese | 1244 | 1432 |
| LMArena French | 1271 | 1397 |
| LMArena German | 1243 | 1384 |
| LMArena Japanese | 1200 | 1352 |
| LMArena Korean | 1203 | 1346 |
| LMArena Russian | 1240 | 1400 |
| LMArena Spanish | 1182 | 1371 |

## Instruction Following

- Amazon Nova Pro: 64.9 (#226)
- GPT-5.3 Chat: 72.8 (#129)

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1235 | 1378 |
| LiveBench Instruction Following | 67.1% | — |
| IFEval | 81.5% | — |

## Long Context

- Amazon Nova Pro: 38.1 (#205)
- GPT-5.3 Chat: 42.6 (#120)

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1255 | 1396 |

## Writing & Preference

- Amazon Nova Pro: 43.9 (#226)
- GPT-5.3 Chat: 63.1 (#68)

| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1259 | 1389 |
| LMArena Creative Writing | 1212 | 1355 |
| LMArena Multi-Turn | 1246 | 1412 |
| Short-Story Creative Writing | 60.5% | — |
| EQ-Bench Creative Writing | — | 1690 |
| WildBench | 77.7% | — |
| LiveBench Language | 37% | — |

## FAQ

### Is Amazon Nova Pro better than GPT-5.3 Chat?

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 31.0 on the Noometry Index. Amazon Nova Pro costs 3.4× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

### Which is cheaper, Amazon Nova Pro or GPT-5.3 Chat?

Amazon Nova Pro is cheaper. It lists at $0.80 per million input tokens and $3.20 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

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

GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 35.1 in the Noometry coding category.

### Which has the bigger context window?

Amazon Nova Pro does, with 300K tokens against 128K.

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

17 benchmarks have published results for both models. Amazon Nova Pro has 38 scored results on Noometry and GPT-5.3 Chat has 18.