# Gemini 3.1 Flash Lite vs Solar Pro4

> Solar Pro4 is the stronger model overall, scoring 41.5 to 40.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-1-flash-lite-vs-solar-pro4
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Gemini 3.1 Flash Lite scores higher in 6 categories and Solar Pro4 in 2 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Solar Pro4 leads 27.3 to 22.3.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $0.25 / $1.50 for Gemini 3.1 Flash Lite.
- Gemini 3.1 Flash Lite accepts more context: 1.05M tokens versus 524K.

## Snapshot

| | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| Provider | Google | Upstage |
| Noometry Index | 40.4 | 41.5 |
| Rank | 141 | 123 |
| Context | 1.05M | 524K |
| Input $/M | $0.25 | $0.30 |
| Output $/M | $1.50 | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.1 Flash Lite: 37.5 (#179)
- Solar Pro4: 39.9 (#135)

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena WebDev | 1256 | 1371 |
| LMArena Coding | 1400 | 1439 |
| SciCode | 41.9% | — |
| WeirdML | 52.2% | — |
| ALE-Bench | 797.73 | — |

## Agentic & Tool Use

- Gemini 3.1 Flash Lite: 29.9 (#72)
- Solar Pro4: —

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| DeepResearch Bench | 37.3% | — |

## Reasoning

- Gemini 3.1 Flash Lite: 22.3 (#181)
- Solar Pro4: 27.3 (#107)

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1407 | 1398 |
| Kagi LLM Benchmark | 67.2% | — |
| NYT Connections (extended) | 8.2% | — |
| CritPt | 1.1% | — |
| Chess Puzzles | 25% | — |
| EnigmaEval | 3% | — |
| Thematic Generalization | 63.3% | — |
| DTBench | 76.8% | — |
| LMCA | 35% | — |
| Epoch Capabilities Index | 144.45 | — |
| ForecastBench | 54.4 | — |

## Math

- Gemini 3.1 Flash Lite: 39.5 (#82)
- Solar Pro4: 36.1 (#129)

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Math | 1427 | 1418 |
| FrontierMath (Tiers 1-3) | 27.7% | — |
| OTIS Mock AIME 2024-2025 | 80% | — |

## Knowledge

- Gemini 3.1 Flash Lite: 41.7 (#95)
- Solar Pro4: 39.0 (#128)

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1397 | 1421 |
| GPQA Diamond | 81.8% | — |
| Humanity's Last Exam | 8.6% | — |
| Vectara Hallucination Rate | 8.2% | — |

## Multimodal

- Gemini 3.1 Flash Lite: 38.7 (#57)
- Solar Pro4: —

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1240 | — |

## Multilingual

- Gemini 3.1 Flash Lite: 52.5 (#82)
- Solar Pro4: 49.0 (#134)

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1410 | 1362 |
| LMArena Chinese | 1461 | 1417 |
| LMArena French | 1423 | 1403 |
| LMArena German | 1429 | 1351 |
| LMArena Japanese | 1411 | 1300 |
| LMArena Korean | 1393 | 1383 |
| LMArena Russian | 1420 | 1360 |
| LMArena Spanish | 1420 | 1408 |

## Instruction Following

- Gemini 3.1 Flash Lite: 72.9 (#126)
- Solar Pro4: 72.8 (#128)

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1376 | 1376 |

## Long Context

- Gemini 3.1 Flash Lite: 42.5 (#117)
- Solar Pro4: 42.0 (#125)

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1394 | 1379 |

## Writing & Preference

- Gemini 3.1 Flash Lite: 61.0 (#90)
- Solar Pro4: 56.7 (#133)

| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Text | 1416 | 1386 |
| LMArena Creative Writing | 1401 | 1313 |
| LMArena Multi-Turn | 1417 | 1391 |

## FAQ

### Is Gemini 3.1 Flash Lite better than Solar Pro4?

Solar Pro4 is the stronger model overall, scoring 41.5 to 40.4 on the Noometry Index.

### Which is cheaper, Gemini 3.1 Flash Lite or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Gemini 3.1 Flash Lite lists at $0.25 and $1.50.

### Is Gemini 3.1 Flash Lite or Solar Pro4 better for coding?

Solar Pro4 scores higher on coding benchmarks: 39.9 versus 37.5 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3.1 Flash Lite does, with 1.05M tokens against 524K.

### How many benchmarks do Gemini 3.1 Flash Lite and Solar Pro4 share?

18 benchmarks have published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and Solar Pro4 has 18.