# GPT-4.1 nano vs Solar Pro4

> Solar Pro4 is the stronger model overall, scoring 41.5 to 27.7 on the Noometry Index. GPT-4.1 nano costs 3.0× less per token, which makes it the better buy when Solar Pro4's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-4-1-nano-vs-solar-pro4
- Last updated: 2026-10-10
- Shared benchmarks: 14

## Summary

- They share 14 benchmarks with published results for both. GPT-4.1 nano scores higher in 0 categories and Solar Pro4 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Solar Pro4 leads 27.3 to 8.6.
- GPT-4.1 nano is cheaper at $0.10 / $0.40 per million input/output tokens, against $0.30 / $1.20 for Solar Pro4.
- GPT-4.1 nano accepts more context: 1.05M tokens versus 524K.

## Snapshot

| | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| Provider | OpenAI | Upstage |
| Noometry Index | 27.7 | 41.5 |
| Rank | 322 | 123 |
| Context | 1.05M | 524K |
| Input $/M | $0.10 | $0.30 |
| Output $/M | $0.40 | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-4.1 nano: 23.8 (#325)
- Solar Pro4: 39.9 (#135)

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| LMArena Coding | 1306 | 1439 |
| Aider Polyglot | 8.9% | — |
| LMArena WebDev | — | 1371 |
| SciCode | 25.9% | — |
| WeirdML | 19% | — |

## Agentic & Tool Use

- GPT-4.1 nano: 26.3 (#98)
- Solar Pro4: —

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| Berkeley Function Calling Leaderboard | 33% | — |

## Reasoning

- GPT-4.1 nano: 8.6 (#344)
- Solar Pro4: 27.3 (#107)

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1286 | 1398 |
| ARC-AGI-2 | 0% | — |
| Kagi LLM Benchmark | 33.3% | — |
| ARC-AGI-1 | 0% | — |
| CritPt | 0% | — |
| DTBench | 52.5% | — |
| LMCA | 5.5% | — |
| Epoch Capabilities Index | 129.62 | — |

## Math

- GPT-4.1 nano: 25.5 (#246)
- Solar Pro4: 36.1 (#129)

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| LMArena Math | 1274 | 1418 |
| OTIS Mock AIME 2024-2025 | 28.9% | — |
| Omni-MATH | 36.7% | — |
| MATH Level 5 | 70% | — |
| FrontierMath (Feb 2025 set) | 1% | — |

## Knowledge

- GPT-4.1 nano: 21.8 (#268)
- Solar Pro4: 39.0 (#128)

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1272 | 1421 |
| GPQA Diamond | 48.9% | — |
| SimpleQA Verified | 6% | — |
| MMLU-Pro | 55% | — |
| GPQA (HELM) | 50.7% | — |

## Multimodal

- GPT-4.1 nano: 28.6 (#108)
- Solar Pro4: —

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1063 | — |

## Multilingual

- GPT-4.1 nano: 41.8 (#200)
- Solar Pro4: 49.0 (#134)

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1260 | 1362 |
| LMArena Chinese | 1270 | 1417 |
| LMArena German | 1288 | 1351 |
| LMArena Japanese | 1199 | 1300 |
| LMArena Russian | 1261 | 1360 |
| LMArena French | — | 1403 |
| LMArena Korean | — | 1383 |
| LMArena Spanish | — | 1408 |

## Instruction Following

- GPT-4.1 nano: 68.0 (#188)
- Solar Pro4: 72.8 (#128)

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1267 | 1376 |
| IFEval | 84.3% | — |

## Long Context

- GPT-4.1 nano: 23.7 (#291)
- Solar Pro4: 42.0 (#125)

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1283 | 1379 |
| Fiction.LiveBench | 25% | — |

## Writing & Preference

- GPT-4.1 nano: 40.7 (#238)
- Solar Pro4: 56.7 (#133)

| Benchmark | GPT-4.1 nano | Solar Pro4 |
|---|---|---|
| LMArena Text | 1285 | 1386 |
| LMArena Creative Writing | 1260 | 1313 |
| LMArena Multi-Turn | 1277 | 1391 |
| EQ-Bench Creative Writing | 946 | — |
| WildBench | 81.2% | — |

## FAQ

### Is GPT-4.1 nano better than Solar Pro4?

Solar Pro4 is the stronger model overall, scoring 41.5 to 27.7 on the Noometry Index. GPT-4.1 nano costs 3.0× less per token, which makes it the better buy when Solar Pro4's lead doesn't matter for your workload.

### Which is cheaper, GPT-4.1 nano or Solar Pro4?

GPT-4.1 nano is cheaper. It lists at $0.10 per million input tokens and $0.40 per million output tokens; Solar Pro4 lists at $0.30 and $1.20.

### Is GPT-4.1 nano or Solar Pro4 better for coding?

Solar Pro4 scores higher on coding benchmarks: 39.9 versus 23.8 in the Noometry coding category.

### Which has the bigger context window?

GPT-4.1 nano does, with 1.05M tokens against 524K.

### How many benchmarks do GPT-4.1 nano and Solar Pro4 share?

14 benchmarks have published results for both models. GPT-4.1 nano has 38 scored results on Noometry and Solar Pro4 has 18.