# Mercury vs Sonar

> Mercury and Sonar score almost the same on the Noometry Index (37.6 vs 38.5), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/mercury-vs-sonar
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in writing & preference, where Sonar leads 52.6 to 46.2.

## Snapshot

| | Mercury | Sonar |
|---|---|---|
| Provider | Inception | Perplexity |
| Noometry Index | 37.6 | 38.5 |
| Rank | 199 | 187 |
| Context | — | 128K |
| Input $/M | — | $1 |
| Output $/M | — | $1 |
| Weights | Proprietary | Proprietary |

## Coding

- Mercury: 38.7 (#170)
- Sonar: 35.7 (#221)

| Benchmark | Mercury | Sonar |
|---|---|---|
| LiveBench Coding | — | 35.1% |
| LMArena Coding | 1322 | — |

## Reasoning

- Mercury: 17.5 (#293)
- Sonar: 21.1 (#227)

| Benchmark | Mercury | Sonar |
|---|---|---|
| Kagi LLM Benchmark | 21.6% | — |
| LiveBench Reasoning | — | 46.3% |
| LMArena Hard Prompts | 1285 | — |
| LiveBench Data Analysis | — | 37.9% |
| LiveBench | — | 46.9% |

## Math

- Mercury: —
- Sonar: 33.7 (#200)

| Benchmark | Mercury | Sonar |
|---|---|---|
| LiveBench Math | — | 41.6% |

## Multilingual

- Mercury: 41.6 (#206)
- Sonar: —

| Benchmark | Mercury | Sonar |
|---|---|---|
| LMArena Non-English | 1260 | — |

## Instruction Following

- Mercury: 65.2 (#224)
- Sonar: 71.4 (#150)

| Benchmark | Mercury | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |
| LMArena Instruction Following | 1239 | — |

## Long Context

- Mercury: 38.4 (#198)
- Sonar: —

| Benchmark | Mercury | Sonar |
|---|---|---|
| LMArena Longer Query | 1266 | — |

## Writing & Preference

- Mercury: 46.2 (#221)
- Sonar: 52.6 (#167)

| Benchmark | Mercury | Sonar |
|---|---|---|
| LMArena Text | 1282 | — |
| LMArena Creative Writing | 1191 | — |
| LMArena Multi-Turn | 1282 | — |
| LiveBench Language | — | 44.1% |

## FAQ

### Is Mercury better than Sonar?

Mercury and Sonar score almost the same on the Noometry Index (37.6 vs 38.5), so choose on price, context window or the category you care about most.

### Is Mercury or Sonar better for coding?

Mercury scores higher on coding benchmarks: 38.7 versus 35.7 in the Noometry coding category.

### How many benchmarks do Mercury and Sonar share?

0 benchmarks have published results for both models. Mercury has 9 scored results on Noometry and Sonar has 7.