Model comparison
Gemini 3.1 Flash Lite vs Solar Pro4
Solar Pro4 is the stronger model overall, scoring 42.1 to 40.8 on the Noometry Index.
Last verified . 18 shared benchmarks.
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UpstageSummary
- 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 28.5 to 22.9.
- 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.
Side by side
| Gemini 3.1 Flash Lite | Solar Pro4 | |
|---|---|---|
| Provider | Upstage | |
| Noometry Index | 40.8 | 42.1 |
| Released | 2026-03-03 | 2026-08-06 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 524K |
| Max output | 66K | 131K |
| Input $ / M tokens | $0.25 | $0.30 |
| Output $ / M tokens | $1.50 | $1.20 |
| Results tracked | 38 | 18 |
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Category by category
Coding Solar Pro4 leads
Gemini 3.1 Flash Lite: 37.8 (#188), Solar Pro4: 40.1 (#149)
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena WebDev | 1256 | 1371 |
| LMArena Coding | 1400 | 1437 |
| SciCode | 41.9% | — |
| WeirdML | 52.2% | — |
| ALE-Bench | 797.73 | — |
Agentic & Tool Use Not comparable
Gemini 3.1 Flash Lite: 30.2 (#79), Solar Pro4: —
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| DeepResearch Bench | 37.3% | — |
Reasoning Solar Pro4 leads
Gemini 3.1 Flash Lite: 22.9 (#186), Solar Pro4: 28.5 (#104)
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1407 | 1399 |
| 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 | 144.47 | — |
| ForecastBench | 54.4 | — |
Math Gemini 3.1 Flash Lite leads
Gemini 3.1 Flash Lite: 40.7 (#90), Solar Pro4: 38.8 (#128)
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Math | 1428 | 1416 |
| FrontierMath (Tiers 1-3) | 27.7% | — |
| OTIS Mock AIME 2024-2025 | 80% | — |
Knowledge Gemini 3.1 Flash Lite leads
Gemini 3.1 Flash Lite: 41.9 (#104), Solar Pro4: 39.8 (#129)
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1398 | 1427 |
| GPQA Diamond | 81.8% | — |
| Humanity's Last Exam | 8.6% | — |
| Vectara Hallucination Rate | 8.2% | — |
Multimodal Not comparable
Gemini 3.1 Flash Lite: 39.4 (#60), Solar Pro4: —
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1240 | — |
Multilingual Gemini 3.1 Flash Lite leads
Gemini 3.1 Flash Lite: 52.3 (#86), Solar Pro4: 48.7 (#139)
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1411 | 1361 |
| LMArena Chinese | 1461 | 1415 |
| LMArena French | 1424 | 1397 |
| LMArena German | 1429 | 1364 |
| LMArena Japanese | 1413 | 1309 |
| LMArena Korean | 1392 | 1382 |
| LMArena Russian | 1420 | 1360 |
| LMArena Spanish | 1421 | 1401 |
Instruction Following Too close to call
Gemini 3.1 Flash Lite: 72.7 (#131), Solar Pro4: 72.7 (#132)
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1377 | 1377 |
Long Context Too close to call
Gemini 3.1 Flash Lite: 42.5 (#122), Solar Pro4: 42.1 (#130)
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1394 | 1381 |
Writing & Preference Gemini 3.1 Flash Lite leads
Gemini 3.1 Flash Lite: 60.9 (#94), Solar Pro4: 56.5 (#138)
| Benchmark | Gemini 3.1 Flash Lite | Solar Pro4 |
|---|---|---|
| LMArena Text | 1416 | 1386 |
| LMArena Creative Writing | 1401 | 1316 |
| LMArena Multi-Turn | 1417 | 1385 |
Frequently asked questions
Is Gemini 3.1 Flash Lite better than Solar Pro4?
Solar Pro4 is the stronger model overall, scoring 42.1 to 40.8 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: 40.1 versus 37.8 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.