# Amazon Nova Micro vs GPT-5.3 Chat

> GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 29.9 on the Noometry Index. Amazon Nova Micro costs 79× 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-micro-vs-gpt-5-3-chat
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Amazon Nova Micro 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 63.3 to 39.7.
- Amazon Nova Micro is cheaper at $0.035 / $0.14 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.

## Snapshot

| | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 29.9 | 42.1 |
| Rank | 290 | 109 |
| Context | 128K | 128K |
| Input $/M | $0.035 | $1.75 |
| Output $/M | $0.14 | $14 |
| Weights | Proprietary | Proprietary |

## Coding

- Amazon Nova Micro: 30.0 (#289)
- GPT-5.3 Chat: 40.8 (#124)

| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1218 | 1408 |
| LiveBench Coding | 20.2% | — |

## Agentic & Tool Use

- Amazon Nova Micro: 21.9 (#125)
- GPT-5.3 Chat: —

| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| Berkeley Function Calling Leaderboard | 22.3% | — |

## Reasoning

- Amazon Nova Micro: 16.7 (#289)
- GPT-5.3 Chat: 27.3 (#105)

| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1191 | 1399 |
| LiveBench Reasoning | 25.1% | — |
| LiveBench Data Analysis | 34% | — |
| LiveBench | 29.6% | — |

## Math

- Amazon Nova Micro: 24.9 (#252)
- GPT-5.3 Chat: 35.4 (#146)

| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1206 | 1389 |
| Omni-MATH | 21.4% | — |
| LiveBench Math | 34.5% | — |

## Knowledge

- Amazon Nova Micro: 29.2 (#231)
- GPT-5.3 Chat: 38.2 (#137)

| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1184 | 1397 |
| MMLU-Pro | 51.1% | — |
| Vectara Hallucination Rate | 5.5% | — |
| GPQA (HELM) | 38.3% | — |
| MMLU | 70.8% | — |

## Multilingual

- Amazon Nova Micro: 36.7 (#234)
- GPT-5.3 Chat: 50.5 (#119)

| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1186 | 1383 |
| LMArena Chinese | 1209 | 1433 |
| LMArena French | 1237 | 1398 |
| LMArena German | 1192 | 1384 |
| LMArena Japanese | 1154 | 1351 |
| LMArena Korean | 1150 | 1347 |
| LMArena Russian | 1185 | 1400 |
| LMArena Spanish | 1225 | 1371 |

## Instruction Following

- Amazon Nova Micro: 56.6 (#267)
- GPT-5.3 Chat: 73.0 (#124)

| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1174 | 1378 |
| LiveBench Instruction Following | 48% | — |
| IFEval | 76% | — |

## Long Context

- Amazon Nova Micro: 36.5 (#224)
- GPT-5.3 Chat: 42.6 (#115)

| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1206 | 1396 |

## Writing & Preference

- Amazon Nova Micro: 39.7 (#242)
- GPT-5.3 Chat: 63.3 (#65)

| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1208 | 1389 |
| LMArena Creative Writing | 1172 | 1356 |
| LMArena Multi-Turn | 1178 | 1413 |
| EQ-Bench Creative Writing | — | 1690 |
| WildBench | 74.3% | — |
| LiveBench Language | 15.8% | — |

## FAQ

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

GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 29.9 on the Noometry Index. Amazon Nova Micro costs 79× 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 Micro or GPT-5.3 Chat?

Amazon Nova Micro is cheaper. It lists at $0.035 per million input tokens and $0.14 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

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

GPT-5.3 Chat scores higher on coding benchmarks: 40.8 versus 30.0 in the Noometry coding category.

### Which has the bigger context window?

Both accept 128K tokens.

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

17 benchmarks have published results for both models. Amazon Nova Micro has 32 scored results on Noometry and GPT-5.3 Chat has 18.