# GPT-5 Mini vs Solar Pro4

> GPT-5 Mini and Solar Pro4 score almost the same on the Noometry Index (41.8 vs 42.1), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gpt-5-mini-vs-solar-pro4
- Last updated: 2026-10-11
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GPT-5 Mini scores higher in 5 categories and Solar Pro4 in 3 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5 Mini leads 46.7 to 38.8.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $0.25 / $2 for GPT-5 Mini.
- Solar Pro4 accepts more context: 524K tokens versus 400K.

## Snapshot

| | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| Provider | OpenAI | Upstage |
| Noometry Index | 41.8 | 42.1 |
| Rank | 128 | 121 |
| Context | 400K | 524K |
| Input $/M | $0.25 | $0.30 |
| Output $/M | $2 | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5 Mini: 40.1 (#146)
- Solar Pro4: 40.1 (#149)

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| LMArena Coding | 1406 | 1437 |
| SWE-bench Verified | 64.7% | — |
| SWE-bench Verified (bash only) | 59.8% | — |
| LMArena WebDev | — | 1371 |
| SWE-bench Multilingual | 39.7% | — |
| SciCode | 39.2% | — |
| WeirdML | 52.7% | — |
| ALE-Bench | 799.77 | — |
| AlgoTune | 1.38 | — |

## Agentic & Tool Use

- GPT-5 Mini: 31.1 (#70)
- Solar Pro4: —

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| Terminal-Bench | 34.8% | — |
| Berkeley Function Calling Leaderboard | 55.5% | — |
| Vending-Bench 2 | -31.18 | — |

## Reasoning

- GPT-5 Mini: 23.9 (#168)
- Solar Pro4: 28.5 (#104)

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1380 | 1399 |
| ARC-AGI-2 | 4.4% | — |
| Kagi LLM Benchmark | 70.3% | — |
| ARC-AGI-1 | 54.3% | — |
| CritPt | 0% | — |
| Chess Puzzles | 30% | — |
| EnigmaEval | 8.2% | — |
| Mystery Game Puzzles | 10% | — |
| DTBench | 80.5% | — |
| LMCA | 34.2% | — |
| Epoch Capabilities Index | 145.52 | — |
| ForecastBench | 61 | — |

## Math

- GPT-5 Mini: 46.7 (#69)
- Solar Pro4: 38.8 (#128)

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| LMArena Math | 1378 | 1416 |
| FrontierMath (Tiers 1-3) | 46.7% | — |
| FrontierMath Tier 4 | 12.2% | — |
| OTIS Mock AIME 2024-2025 | 86.7% | — |
| ProofBench | 9% | — |
| Omni-MATH | 72.2% | — |
| MATH Level 5 | 97.8% | — |
| FrontierMath (Feb 2025 set) | 27.2% | — |
| FrontierMath Tier 4 (v1) | 6.3% | — |

## Knowledge

- GPT-5 Mini: 45.6 (#86)
- Solar Pro4: 39.8 (#129)

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1379 | 1427 |
| GPQA Diamond | 75% | — |
| Humanity's Last Exam | 19.4% | — |
| SimpleQA Verified | 21.6% | — |
| MMLU-Pro | 83.5% | — |
| Confabulations | 13.3% | — |
| Vectara Hallucination Rate | 12.9% | — |
| GPQA (HELM) | 75.6% | — |

## Multimodal

- GPT-5 Mini: 35.6 (#85)
- Solar Pro4: —

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1202 | — |
| VPCT | 40.2% | — |

## Multilingual

- GPT-5 Mini: 48.9 (#137)
- Solar Pro4: 48.7 (#139)

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1363 | 1361 |
| LMArena Chinese | 1385 | 1415 |
| LMArena French | 1386 | 1397 |
| LMArena German | 1366 | 1364 |
| LMArena Japanese | 1341 | 1309 |
| LMArena Korean | 1308 | 1382 |
| LMArena Russian | 1362 | 1360 |
| LMArena Spanish | 1355 | 1401 |

## Instruction Following

- GPT-5 Mini: 76.2 (#46)
- Solar Pro4: 72.7 (#132)

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1357 | 1377 |
| IFEval | 92.7% | — |

## Long Context

- GPT-5 Mini: 41.9 (#132)
- Solar Pro4: 42.1 (#130)

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1355 | 1381 |
| Fiction.LiveBench | 69.4% | — |

## Writing & Preference

- GPT-5 Mini: 55.2 (#148)
- Solar Pro4: 56.5 (#138)

| Benchmark | GPT-5 Mini | Solar Pro4 |
|---|---|---|
| LMArena Text | 1373 | 1386 |
| LMArena Creative Writing | 1325 | 1316 |
| LMArena Multi-Turn | 1363 | 1385 |
| Short-Story Creative Writing | 83.1% | — |
| EQ-Bench Creative Writing | 1313 | — |
| WildBench | 85.5% | — |

## FAQ

### Is GPT-5 Mini better than Solar Pro4?

GPT-5 Mini and Solar Pro4 score almost the same on the Noometry Index (41.8 vs 42.1), so choose on price, context window or the category you care about most.

### Which is cheaper, GPT-5 Mini or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; GPT-5 Mini lists at $0.25 and $2.

### Is GPT-5 Mini or Solar Pro4 better for coding?

They score almost the same on coding (40.1 vs 40.1); test both on your own repository before choosing.

### Which has the bigger context window?

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

### How many benchmarks do GPT-5 Mini and Solar Pro4 share?

17 benchmarks have published results for both models. GPT-5 Mini has 60 scored results on Noometry and Solar Pro4 has 18.