# GPT-6.1 Sol vs Solar Pro4

> Solar Pro4 has enough public results to be ranked (#123); GPT-6.1 Sol does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/gpt-6-1-sol-vs-solar-pro4
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-6.1 Sol leads 51.4 to 39.9.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $2 / $10 for GPT-6.1 Sol.
- GPT-6.1 Sol accepts more context: 1.05M tokens versus 524K.

## Snapshot

| | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| Provider | OpenAI | Upstage |
| Noometry Index | 42.1 | 41.5 |
| Rank | — | 123 |
| Context | 1.05M | 524K |
| Input $/M | $2 | $0.30 |
| Output $/M | $10 | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-6.1 Sol: 51.4
- Solar Pro4: 39.9 (#135)

| Benchmark | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| DeepSWE | 75.2% | — |
| LMArena WebDev | — | 1371 |
| LMArena Coding | — | 1439 |

## Agentic & Tool Use

- GPT-6.1 Sol: 34.3
- Solar Pro4: —

| Benchmark | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| GDP.pdf | 32% | — |

## Reasoning

- GPT-6.1 Sol: —
- Solar Pro4: 27.3 (#107)

| Benchmark | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | — | 1398 |

## Math

- GPT-6.1 Sol: —
- Solar Pro4: 36.1 (#129)

| Benchmark | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| LMArena Math | — | 1418 |

## Knowledge

- GPT-6.1 Sol: —
- Solar Pro4: 39.0 (#128)

| Benchmark | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| LMArena Expert | — | 1421 |

## Multilingual

- GPT-6.1 Sol: —
- Solar Pro4: 49.0 (#134)

| Benchmark | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| LMArena Non-English | — | 1362 |
| LMArena Chinese | — | 1417 |
| LMArena French | — | 1403 |
| LMArena German | — | 1351 |
| LMArena Japanese | — | 1300 |
| LMArena Korean | — | 1383 |
| LMArena Russian | — | 1360 |
| LMArena Spanish | — | 1408 |

## Instruction Following

- GPT-6.1 Sol: —
- Solar Pro4: 72.8 (#128)

| Benchmark | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | — | 1376 |

## Long Context

- GPT-6.1 Sol: —
- Solar Pro4: 42.0 (#125)

| Benchmark | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | — | 1379 |

## Writing & Preference

- GPT-6.1 Sol: —
- Solar Pro4: 56.7 (#133)

| Benchmark | GPT-6.1 Sol | Solar Pro4 |
|---|---|---|
| LMArena Text | — | 1386 |
| LMArena Creative Writing | — | 1313 |
| LMArena Multi-Turn | — | 1391 |

## FAQ

### Is GPT-6.1 Sol better than Solar Pro4?

Solar Pro4 has enough public results to be ranked (#123); GPT-6.1 Sol does not yet, so treat this comparison as directional.

### Which is cheaper, GPT-6.1 Sol or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; GPT-6.1 Sol lists at $2 and $10.

### Is GPT-6.1 Sol or Solar Pro4 better for coding?

GPT-6.1 Sol scores higher on coding benchmarks: 51.4 versus 39.9 in the Noometry coding category.

### Which has the bigger context window?

GPT-6.1 Sol does, with 1.05M tokens against 524K.

### How many benchmarks do GPT-6.1 Sol and Solar Pro4 share?

0 benchmarks have published results for both models. GPT-6.1 Sol has 2 scored results on Noometry and Solar Pro4 has 18.