Model comparison
Gemini 2.5 Pro vs Solar Pro4
Gemini 2.5 Pro is the stronger model overall, scoring 45.0 to 42.1 on the Noometry Index. Solar Pro4 costs 6.5× less per token, which makes it the better buy when Gemini 2.5 Pro's lead doesn't matter for your workload.
Last verified . 18 shared benchmarks.
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UpstageSummary
- They share 18 benchmarks with published results for both. Gemini 2.5 Pro scores higher in 7 categories and Solar Pro4 in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in long context, where Gemini 2.5 Pro leads 59.8 to 42.1.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $1.25 / $10 for Gemini 2.5 Pro.
- Gemini 2.5 Pro accepts more context: 1.05M tokens versus 524K.
Side by side
| Gemini 2.5 Pro | Solar Pro4 | |
|---|---|---|
| Provider | Upstage | |
| Noometry Index | 45.0 | 42.1 |
| Released | 2025-03-25 | 2026-08-06 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 524K |
| Max output | 66K | 131K |
| Input $ / M tokens | $1.25 | $0.30 |
| Output $ / M tokens | $10 | $1.20 |
| Results tracked | 78 | 18 |
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Category by category
Coding Gemini 2.5 Pro leads
Gemini 2.5 Pro: 42.4 (#101), Solar Pro4: 40.1 (#149)
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| LMArena WebDev | 1227 | 1371 |
| LMArena Coding | 1452 | 1437 |
| SWE-bench Verified | 57.6% | — |
| SWE-bench Verified (bash only) | 53.6% | — |
| Aider Polyglot | 83.1% | — |
| SciCode | 42.8% | — |
| GSO | 3.9% | — |
| WeirdML | 54% | — |
| LiveBench Coding | 85.9% | — |
| CadEval | 64% | — |
| ALE-Bench | 785.52 | — |
| AlgoTune | 1.51 | — |
Agentic & Tool Use Not comparable
Gemini 2.5 Pro: 29.2 (#88), Solar Pro4: —
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| Terminal-Bench | 32.6% | — |
| GDPval | 23.3% | — |
| Remote Labor Index | 0.8% | — |
| TheAgentCompany | 30.3% | — |
| τ²-bench Banking | 13.7% | — |
| DeepResearch Bench | 42.8% | — |
| BALROG | 43.3% | — |
| LMArena Search | 1142 | — |
| METR Time Horizons | 55.4% | — |
| Vending-Bench 2 | 573.64 | — |
Reasoning Too close to call
Gemini 2.5 Pro: 28.8 (#99), Solar Pro4: 28.5 (#104)
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1455 | 1399 |
| ARC-AGI-2 | 4.9% | — |
| SimpleBench | 62.4% | — |
| Kagi LLM Benchmark | 70.3% | — |
| ARC-AGI-1 | 41% | — |
| CritPt | 2% | — |
| Chess Puzzles | 20% | — |
| EnigmaEval | 5.6% | — |
| LiveBench Reasoning | 89.8% | — |
| DTBench | 82.4% | — |
| LiveBench Data Analysis | 79.9% | — |
| LMCA | 34.8% | — |
| Epoch Capabilities Index | 145.32 | — |
| ForecastBench | 61.3 | — |
| LiveBench | 82.3% | — |
Math Solar Pro4 leads
Gemini 2.5 Pro: 32.5 (#213), Solar Pro4: 38.8 (#128)
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| LMArena Math | 1450 | 1416 |
| FrontierMath (Tiers 1-3) | 24.6% | — |
| FrontierMath Tier 4 | 0% | — |
| OTIS Mock AIME 2024-2025 | 84.7% | — |
| Omni-MATH | 41.6% | — |
| LiveBench Math | 90.2% | — |
| MATH Level 5 | 95.9% | — |
| FrontierMath (Feb 2025 set) | 14.1% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Gemini 2.5 Pro leads
Gemini 2.5 Pro: 56.0 (#46), Solar Pro4: 39.8 (#129)
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1452 | 1427 |
| GPQA Diamond | 85.3% | — |
| Humanity's Last Exam | 21.6% | — |
| MMLU-Pro | 86.3% | — |
| Confabulations | 10.6% | — |
| Vectara Hallucination Rate | 7% | — |
| GPQA (HELM) | 74.9% | — |
Multimodal Not comparable
Gemini 2.5 Pro: 45.2 (#18), Solar Pro4: —
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1263 | — |
| GeoBench | 86% | — |
| VPCT | 48% | — |
| LMArena Document | 1421 | — |
| SpatialViz-Bench | 44.7% | — |
Multilingual Gemini 2.5 Pro leads
Gemini 2.5 Pro: 55.3 (#31), Solar Pro4: 48.7 (#139)
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1451 | 1361 |
| LMArena Chinese | 1507 | 1415 |
| LMArena French | 1472 | 1397 |
| LMArena German | 1487 | 1364 |
| LMArena Japanese | 1461 | 1309 |
| LMArena Korean | 1434 | 1382 |
| LMArena Russian | 1461 | 1360 |
| LMArena Spanish | 1473 | 1401 |
Instruction Following Gemini 2.5 Pro leads
Gemini 2.5 Pro: 75.0 (#75), Solar Pro4: 72.7 (#132)
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1437 | 1377 |
| LiveBench Instruction Following | 80.6% | — |
| IFEval | 84% | — |
Long Context Gemini 2.5 Pro leads
Gemini 2.5 Pro: 59.8 (#5), Solar Pro4: 42.1 (#130)
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1449 | 1381 |
| Fiction.LiveBench | 91.7% | — |
Writing & Preference Gemini 2.5 Pro leads
Gemini 2.5 Pro: 63.7 (#62), Solar Pro4: 56.5 (#138)
| Benchmark | Gemini 2.5 Pro | Solar Pro4 |
|---|---|---|
| LMArena Text | 1458 | 1386 |
| LMArena Creative Writing | 1454 | 1316 |
| LMArena Multi-Turn | 1453 | 1385 |
| Short-Story Creative Writing | 83.8% | — |
| EQ-Bench Creative Writing | 1421 | — |
| WildBench | 85.7% | — |
| LiveBench Language | 67.8% | — |
Frequently asked questions
Is Gemini 2.5 Pro better than Solar Pro4?
Gemini 2.5 Pro is the stronger model overall, scoring 45.0 to 42.1 on the Noometry Index. Solar Pro4 costs 6.5× less per token, which makes it the better buy when Gemini 2.5 Pro's lead doesn't matter for your workload.
Which is cheaper, Gemini 2.5 Pro or Solar Pro4?
Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Gemini 2.5 Pro lists at $1.25 and $10.
Is Gemini 2.5 Pro or Solar Pro4 better for coding?
Gemini 2.5 Pro scores higher on coding benchmarks: 42.4 versus 40.1 in the Noometry coding category.
Which has the bigger context window?
Gemini 2.5 Pro does, with 1.05M tokens against 524K.
How many benchmarks do Gemini 2.5 Pro and Solar Pro4 share?
18 benchmarks have published results for both models. Gemini 2.5 Pro has 78 scored results on Noometry and Solar Pro4 has 18.