# Amazon Nova Experimental Chat 10 20 vs Mercury 2

> Amazon Nova Experimental Chat 10 20 is the stronger model overall, scoring 41.5 to 38.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-20-vs-mercury-2
- Last updated: 2026-10-10
- Shared benchmarks: 11

## Summary

- They share 11 benchmarks with published results for both. Amazon Nova Experimental Chat 10 20 scores higher in 7 categories and Mercury 2 in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in coding, where Amazon Nova Experimental Chat 10 20 leads 41.0 to 33.2.

## Snapshot

| | Amazon Nova Experimental Chat 10 20 | Mercury 2 |
|---|---|---|
| Provider | Amazon | Inception |
| Noometry Index | 41.5 | 38.8 |
| Rank | 122 | 167 |
| Context | — | 128K |
| Input $/M | — | $0.25 |
| Output $/M | — | $0.75 |
| Weights | Proprietary | Proprietary |

## Coding

- Amazon Nova Experimental Chat 10 20: 41.0 (#123)
- Mercury 2: 33.2 (#250)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Mercury 2 |
|---|---|---|
| LMArena Coding | 1413 | 1391 |
| LMArena WebDev | — | 1170 |
| SciCode | — | 38.7% |
| WeirdML | — | 43.2% |
| ALE-Bench | — | 785.58 |

## Reasoning

- Amazon Nova Experimental Chat 10 20: 27.3 (#110)
- Mercury 2: 23.0 (#170)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Mercury 2 |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1362 |
| CritPt | — | 0.8% |

## Math

- Amazon Nova Experimental Chat 10 20: 36.2 (#121)
- Mercury 2: —

| Benchmark | Amazon Nova Experimental Chat 10 20 | Mercury 2 |
|---|---|---|
| LMArena Math | 1425 | — |

## Knowledge

- Amazon Nova Experimental Chat 10 20: 37.8 (#142)
- Mercury 2: 35.6 (#170)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Mercury 2 |
|---|---|---|
| LMArena Expert | 1385 | 1358 |
| Vectara Hallucination Rate | — | 12.3% |

## Multilingual

- Amazon Nova Experimental Chat 10 20: 49.7 (#127)
- Mercury 2: 46.8 (#153)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Mercury 2 |
|---|---|---|
| LMArena Non-English | 1372 | 1331 |
| LMArena Chinese | 1405 | 1416 |
| LMArena Russian | 1371 | 1303 |
| LMArena French | 1426 | — |
| LMArena German | 1391 | — |
| LMArena Japanese | 1355 | — |
| LMArena Korean | 1327 | — |
| LMArena Spanish | 1381 | — |

## Instruction Following

- Amazon Nova Experimental Chat 10 20: 72.3 (#136)
- Mercury 2: 70.4 (#161)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Mercury 2 |
|---|---|---|
| LMArena Instruction Following | 1365 | 1328 |

## Long Context

- Amazon Nova Experimental Chat 10 20: 41.7 (#128)
- Mercury 2: 40.4 (#149)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Mercury 2 |
|---|---|---|
| LMArena Longer Query | 1370 | 1329 |

## Writing & Preference

- Amazon Nova Experimental Chat 10 20: 56.9 (#131)
- Mercury 2: 54.0 (#151)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Mercury 2 |
|---|---|---|
| LMArena Text | 1394 | 1355 |
| LMArena Creative Writing | 1318 | 1289 |
| LMArena Multi-Turn | 1364 | 1358 |

## FAQ

### Is Amazon Nova Experimental Chat 10 20 better than Mercury 2?

Amazon Nova Experimental Chat 10 20 is the stronger model overall, scoring 41.5 to 38.8 on the Noometry Index.

### Is Amazon Nova Experimental Chat 10 20 or Mercury 2 better for coding?

Amazon Nova Experimental Chat 10 20 scores higher on coding benchmarks: 41.0 versus 33.2 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 10 20 and Mercury 2 share?

11 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Mercury 2 has 17.