# Claude 2.1 vs Solar Pro4

> Solar Pro4 is the stronger model overall, scoring 42.1 to 25.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-solar-pro4
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Solar Pro4 leads 38.8 to 10.2.

## Snapshot

| | Claude 2.1 | Solar Pro4 |
|---|---|---|
| Provider | Anthropic | Upstage |
| Noometry Index | 25.2 | 42.1 |
| Rank | 345 | 121 |
| Context | — | 524K |
| Input $/M | — | $0.30 |
| Output $/M | — | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 2.1: 26.2 (#327)
- Solar Pro4: 40.1 (#149)

| Benchmark | Claude 2.1 | Solar Pro4 |
|---|---|---|
| LMArena WebDev | — | 1371 |
| WeirdML | 7.1% | — |
| LMArena Coding | — | 1437 |

## Reasoning

- Claude 2.1: 21.4 (#221)
- Solar Pro4: 28.5 (#104)

| Benchmark | Claude 2.1 | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | — | 1399 |
| DTBench | 51% | — |
| Epoch Capabilities Index | 119.27 | — |
| ForecastBench | 54.2 | — |

## Math

- Claude 2.1: 10.2 (#315)
- Solar Pro4: 38.8 (#128)

| Benchmark | Claude 2.1 | Solar Pro4 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | — |
| LMArena Math | — | 1416 |

## Knowledge

- Claude 2.1: 15.4 (#292)
- Solar Pro4: 39.8 (#129)

| Benchmark | Claude 2.1 | Solar Pro4 |
|---|---|---|
| GPQA Diamond | 33% | — |
| LMArena Expert | — | 1427 |
| MMLU | 73.5% | — |

## Multilingual

- Claude 2.1: —
- Solar Pro4: 48.7 (#139)

| Benchmark | Claude 2.1 | Solar Pro4 |
|---|---|---|
| LMArena Non-English | — | 1361 |
| LMArena Chinese | — | 1415 |
| LMArena French | — | 1397 |
| LMArena German | — | 1364 |
| LMArena Japanese | — | 1309 |
| LMArena Korean | — | 1382 |
| LMArena Russian | — | 1360 |
| LMArena Spanish | — | 1401 |

## Instruction Following

- Claude 2.1: —
- Solar Pro4: 72.7 (#132)

| Benchmark | Claude 2.1 | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | — | 1377 |

## Long Context

- Claude 2.1: —
- Solar Pro4: 42.1 (#130)

| Benchmark | Claude 2.1 | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | — | 1381 |

## Writing & Preference

- Claude 2.1: —
- Solar Pro4: 56.5 (#138)

| Benchmark | Claude 2.1 | Solar Pro4 |
|---|---|---|
| LMArena Text | — | 1386 |
| LMArena Creative Writing | — | 1316 |
| LMArena Multi-Turn | — | 1385 |

## FAQ

### Is Claude 2.1 better than Solar Pro4?

Solar Pro4 is the stronger model overall, scoring 42.1 to 25.2 on the Noometry Index.

### Is Claude 2.1 or Solar Pro4 better for coding?

Solar Pro4 scores higher on coding benchmarks: 40.1 versus 26.2 in the Noometry coding category.

### How many benchmarks do Claude 2.1 and Solar Pro4 share?

0 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Solar Pro4 has 18.