# Mercury vs Solar Pro4

> Solar Pro4 is the stronger model overall, scoring 42.1 to 37.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mercury-vs-solar-pro4
- Last updated: 2026-10-11
- Shared benchmarks: 8

## Summary

- They share 8 benchmarks with published results for both. Mercury scores higher in 0 categories and Solar Pro4 in 6 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Solar Pro4 leads 28.5 to 17.5.

## Snapshot

| | Mercury | Solar Pro4 |
|---|---|---|
| Provider | Inception | Upstage |
| Noometry Index | 37.6 | 42.1 |
| Rank | 199 | 121 |
| Context | — | 524K |
| Input $/M | — | $0.30 |
| Output $/M | — | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- Mercury: 38.7 (#170)
- Solar Pro4: 40.1 (#149)

| Benchmark | Mercury | Solar Pro4 |
|---|---|---|
| LMArena Coding | 1322 | 1437 |
| LMArena WebDev | — | 1371 |

## Reasoning

- Mercury: 17.5 (#293)
- Solar Pro4: 28.5 (#104)

| Benchmark | Mercury | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1285 | 1399 |
| Kagi LLM Benchmark | 21.6% | — |

## Math

- Mercury: —
- Solar Pro4: 38.8 (#128)

| Benchmark | Mercury | Solar Pro4 |
|---|---|---|
| LMArena Math | — | 1416 |

## Knowledge

- Mercury: —
- Solar Pro4: 39.8 (#129)

| Benchmark | Mercury | Solar Pro4 |
|---|---|---|
| LMArena Expert | — | 1427 |

## Multilingual

- Mercury: 41.6 (#206)
- Solar Pro4: 48.7 (#139)

| Benchmark | Mercury | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1260 | 1361 |
| LMArena Chinese | — | 1415 |
| LMArena French | — | 1397 |
| LMArena German | — | 1364 |
| LMArena Japanese | — | 1309 |
| LMArena Korean | — | 1382 |
| LMArena Russian | — | 1360 |
| LMArena Spanish | — | 1401 |

## Instruction Following

- Mercury: 65.2 (#224)
- Solar Pro4: 72.7 (#132)

| Benchmark | Mercury | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1239 | 1377 |

## Long Context

- Mercury: 38.4 (#198)
- Solar Pro4: 42.1 (#130)

| Benchmark | Mercury | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1266 | 1381 |

## Writing & Preference

- Mercury: 46.2 (#221)
- Solar Pro4: 56.5 (#138)

| Benchmark | Mercury | Solar Pro4 |
|---|---|---|
| LMArena Text | 1282 | 1386 |
| LMArena Creative Writing | 1191 | 1316 |
| LMArena Multi-Turn | 1282 | 1385 |

## FAQ

### Is Mercury better than Solar Pro4?

Solar Pro4 is the stronger model overall, scoring 42.1 to 37.6 on the Noometry Index.

### Is Mercury or Solar Pro4 better for coding?

Solar Pro4 scores higher on coding benchmarks: 40.1 versus 38.7 in the Noometry coding category.

### How many benchmarks do Mercury and Solar Pro4 share?

8 benchmarks have published results for both models. Mercury has 9 scored results on Noometry and Solar Pro4 has 18.