# GPT-5.4 nano vs Solar Pro4

> GPT-5.4 nano and Solar Pro4 score almost the same on the Noometry Index (41.9 vs 41.5), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gpt-5-4-nano-vs-solar-pro4
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GPT-5.4 nano scores higher in 3 categories and Solar Pro4 in 5 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.4 nano leads 40.7 to 36.1.
- GPT-5.4 nano is cheaper at $0.20 / $1.25 per million input/output tokens, against $0.30 / $1.20 for Solar Pro4.
- Solar Pro4 accepts more context: 524K tokens versus 400K.

## Snapshot

| | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| Provider | OpenAI | Upstage |
| Noometry Index | 41.9 | 41.5 |
| Rank | 111 | 123 |
| Context | 400K | 524K |
| Input $/M | $0.20 | $0.30 |
| Output $/M | $1.25 | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.4 nano: 43.1 (#82)
- Solar Pro4: 39.9 (#135)

| Benchmark | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| LMArena Coding | 1404 | 1439 |
| LMArena WebDev | — | 1371 |
| SciCode | 46.9% | — |
| WeirdML | 49.2% | — |
| ALE-Bench | 1,005 | — |

## Reasoning

- GPT-5.4 nano: 23.8 (#159)
- Solar Pro4: 27.3 (#107)

| Benchmark | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1380 | 1398 |
| ARC-AGI-2 | 5.7% | — |
| Kagi LLM Benchmark | 39.7% | — |
| ARC-AGI-1 | 51.5% | — |
| CritPt | 9.3% | — |
| Chess Puzzles | 30% | — |
| Mystery Game Puzzles | 9% | — |
| DTBench | 80.3% | — |
| LMCA | 36.9% | — |
| Epoch Capabilities Index | 145.78 | — |
| ForecastBench | 57.3 | — |

## Math

- GPT-5.4 nano: 40.7 (#76)
- Solar Pro4: 36.1 (#129)

| Benchmark | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| LMArena Math | 1406 | 1418 |
| FrontierMath (Tiers 1-3) | 44.9% | — |
| FrontierMath Tier 4 | 12.2% | — |
| OTIS Mock AIME 2024-2025 | 87.8% | — |
| ProofBench | 5% | — |
| FrontierMath (Feb 2025 set) | 25.9% | — |
| FrontierMath Tier 4 (v1) | 6.3% | — |

## Knowledge

- GPT-5.4 nano: 41.8 (#94)
- Solar Pro4: 39.0 (#128)

| Benchmark | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1397 | 1421 |
| GPQA Diamond | 78.5% | — |
| SimpleQA Verified | 11.7% | — |
| Vectara Hallucination Rate | 3.1% | — |

## Multimodal

- GPT-5.4 nano: 36.0 (#73)
- Solar Pro4: —

| Benchmark | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1196 | — |

## Multilingual

- GPT-5.4 nano: 48.8 (#136)
- Solar Pro4: 49.0 (#134)

| Benchmark | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1359 | 1362 |
| LMArena Chinese | 1391 | 1417 |
| LMArena French | 1396 | 1403 |
| LMArena German | 1368 | 1351 |
| LMArena Japanese | 1342 | 1300 |
| LMArena Korean | 1321 | 1383 |
| LMArena Russian | 1363 | 1360 |
| LMArena Spanish | 1368 | 1408 |

## Instruction Following

- GPT-5.4 nano: 72.1 (#139)
- Solar Pro4: 72.8 (#128)

| Benchmark | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1362 | 1376 |

## Long Context

- GPT-5.4 nano: 41.6 (#131)
- Solar Pro4: 42.0 (#125)

| Benchmark | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1365 | 1379 |

## Writing & Preference

- GPT-5.4 nano: 55.9 (#137)
- Solar Pro4: 56.7 (#133)

| Benchmark | GPT-5.4 nano | Solar Pro4 |
|---|---|---|
| LMArena Text | 1372 | 1386 |
| LMArena Creative Writing | 1313 | 1313 |
| LMArena Multi-Turn | 1382 | 1391 |

## FAQ

### Is GPT-5.4 nano better than Solar Pro4?

GPT-5.4 nano and Solar Pro4 score almost the same on the Noometry Index (41.9 vs 41.5), so choose on price, context window or the category you care about most.

### Which is cheaper, GPT-5.4 nano or Solar Pro4?

GPT-5.4 nano is cheaper. It lists at $0.20 per million input tokens and $1.25 per million output tokens; Solar Pro4 lists at $0.30 and $1.20.

### Is GPT-5.4 nano or Solar Pro4 better for coding?

GPT-5.4 nano scores higher on coding benchmarks: 43.1 versus 39.9 in the Noometry coding category.

### Which has the bigger context window?

Solar Pro4 does, with 524K tokens against 400K.

### How many benchmarks do GPT-5.4 nano and Solar Pro4 share?

17 benchmarks have published results for both models. GPT-5.4 nano has 40 scored results on Noometry and Solar Pro4 has 18.