# Amazon Nova Experimental Chat 11 10 vs GPT-5.3 Codex

> GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 43.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-11-10-vs-gpt-5-3-codex
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-5.3 Codex leads 48.6 to 42.3.

## Snapshot

| | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 43.0 | 45.8 |
| Rank | 101 | 69 |
| Context | — | 400K |
| Input $/M | — | $1.75 |
| Output $/M | — | $14 |
| Weights | Proprietary | Proprietary |

## Coding

- Amazon Nova Experimental Chat 11 10: 42.3 (#107)
- GPT-5.3 Codex: 48.6 (#56)

| Benchmark | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| SWE-bench Verified | — | 74.8% |
| LMArena WebDev | — | 1409 |
| WeirdML | — | 79.3% |
| LMArena Coding | 1433 | — |
| ALE-Bench | — | 1,655 |

## Agentic & Tool Use

- Amazon Nova Experimental Chat 11 10: —
- GPT-5.3 Codex: 48.0 (#9)

| Benchmark | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| Terminal-Bench | — | 78.4% |
| METR Time Horizons | — | 74.5% |
| Vending-Bench 2 | — | 5,940 |

## Reasoning

- Amazon Nova Experimental Chat 11 10: 29.1 (#95)
- GPT-5.3 Codex: —

| Benchmark | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| LMArena Hard Prompts | 1422 | — |
| Epoch Capabilities Index | — | 156.77 |

## Math

- Amazon Nova Experimental Chat 11 10: 39.1 (#114)
- GPT-5.3 Codex: —

| Benchmark | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| LMArena Math | 1431 | — |

## Knowledge

- Amazon Nova Experimental Chat 11 10: 39.9 (#127)
- GPT-5.3 Codex: —

| Benchmark | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| LMArena Expert | 1431 | — |

## Multilingual

- Amazon Nova Experimental Chat 11 10: 51.9 (#98)
- GPT-5.3 Codex: —

| Benchmark | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| LMArena Non-English | 1405 | — |
| LMArena Chinese | 1463 | — |
| LMArena French | 1449 | — |
| LMArena German | 1395 | — |
| LMArena Japanese | 1383 | — |
| LMArena Korean | 1384 | — |
| LMArena Russian | 1394 | — |
| LMArena Spanish | 1444 | — |

## Instruction Following

- Amazon Nova Experimental Chat 11 10: 73.2 (#122)
- GPT-5.3 Codex: —

| Benchmark | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| LMArena Instruction Following | 1387 | — |

## Long Context

- Amazon Nova Experimental Chat 11 10: 42.5 (#121)
- GPT-5.3 Codex: —

| Benchmark | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| LMArena Longer Query | 1395 | — |

## Writing & Preference

- Amazon Nova Experimental Chat 11 10: 58.8 (#114)
- GPT-5.3 Codex: —

| Benchmark | Amazon Nova Experimental Chat 11 10 | GPT-5.3 Codex |
|---|---|---|
| LMArena Text | 1415 | — |
| LMArena Creative Writing | 1349 | — |
| LMArena Multi-Turn | 1380 | — |

## FAQ

### Is Amazon Nova Experimental Chat 11 10 better than GPT-5.3 Codex?

GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 43.0 on the Noometry Index.

### Is Amazon Nova Experimental Chat 11 10 or GPT-5.3 Codex better for coding?

GPT-5.3 Codex scores higher on coding benchmarks: 48.6 versus 42.3 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 11 10 and GPT-5.3 Codex share?

0 benchmarks have published results for both models. Amazon Nova Experimental Chat 11 10 has 17 scored results on Noometry and GPT-5.3 Codex has 8.