Noometry

Model comparison

Gemini 3.8 Flash vs Solar Pro4

Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 42.1 on the Noometry Index. Solar Pro4 costs 2.9× less per token, which makes it the better buy when Gemini 3.8 Flash's lead doesn't matter for your workload.

Last verified . 18 shared benchmarks.

Gemini 3.8 Flash Google

61.8

Rank #11 Confirmed

Solar Pro4 Upstage

42.1

Rank #121 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Gemini 3.8 Flash scores higher in 8 categories and Solar Pro4 in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3.8 Flash leads 76.9 to 28.5.
  • Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $0.75 / $3.75 for Gemini 3.8 Flash.
  • Gemini 3.8 Flash accepts more context: 1.05M tokens versus 524K.

Side by side

Gemini 3.8 FlashSolar Pro4
ProviderGoogleUpstage
Noometry Index61.842.1
Released2026-09-022026-08-06
WeightsProprietaryProprietary
Context window1.05M524K
Max output66K131K
Input $ / M tokens$0.75$0.30
Output $ / M tokens$3.75$1.20
Results tracked5018

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Category by category

Coding Gemini 3.8 Flash leads

Gemini 3.8 Flash: 59.2 (#15), Solar Pro4: 40.1 (#149)

BenchmarkGemini 3.8 FlashSolar Pro4
LMArena WebDev15841371
LMArena Coding15101437
DeepSWE73.8%—
FrontierCode41.2%—
CursorBench39.6%—
FrontierSWE19.6%—
SciCode56.6%—
WeirdML84.8%—
ALE-Bench1,270—

Agentic & Tool Use Not comparable

Gemini 3.8 Flash: 41.8 (#21), Solar Pro4: —

BenchmarkGemini 3.8 FlashSolar Pro4
APEX-Agents64.3%—
Remote Labor Index5.8%—
GDP.pdf23.4%—
Vending-Bench 25,094—

Reasoning Gemini 3.8 Flash leads

Gemini 3.8 Flash: 76.9 (#5), Solar Pro4: 28.5 (#104)

BenchmarkGemini 3.8 FlashSolar Pro4
LMArena Hard Prompts15081399
ARC-AGI-289.2%—
NYT Connections (extended)97.4%—
ARC-AGI-198.5%—
CritPt18.3%—
Chess Puzzles61%—
Mystery Game Puzzles47%—
DTBench95.7%—
LMCA52.9%—
Surface Evolver Bench76.9%—
Epoch Capabilities Index156.71—

Math Gemini 3.8 Flash leads

Gemini 3.8 Flash: 65.3 (#28), Solar Pro4: 38.8 (#128)

BenchmarkGemini 3.8 FlashSolar Pro4
LMArena Math15281416
FrontierMath (Tiers 1-3)68.4%—
FrontierMath Tier 422%—
OTIS Mock AIME 2024-202598.9%—
ProofBench48%—

Knowledge Gemini 3.8 Flash leads

Gemini 3.8 Flash: 74.8 (#2), Solar Pro4: 39.8 (#129)

BenchmarkGemini 3.8 FlashSolar Pro4
LMArena Expert15241427
GPQA Diamond95.4%—
Humanity's Last Exam44.5%—
SimpleQA Verified69.7%—

Multimodal Not comparable

Gemini 3.8 Flash: 40.7 (#45), Solar Pro4: —

BenchmarkGemini 3.8 FlashSolar Pro4
LMArena Vision1314—
Blueprint-Bench 238.6%—
Furniture Assembly31.7%—

Multilingual Gemini 3.8 Flash leads

Gemini 3.8 Flash: 58.0 (#5), Solar Pro4: 48.7 (#139)

BenchmarkGemini 3.8 FlashSolar Pro4
LMArena Non-English14911361
LMArena Chinese15541415
LMArena French14981397
LMArena German14931364
LMArena Japanese15021309
LMArena Korean14591382
LMArena Russian15151360
LMArena Spanish14851401

Instruction Following Gemini 3.8 Flash leads

Gemini 3.8 Flash: 78.0 (#13), Solar Pro4: 72.7 (#132)

BenchmarkGemini 3.8 FlashSolar Pro4
LMArena Instruction Following14901377

Long Context Gemini 3.8 Flash leads

Gemini 3.8 Flash: 46.3 (#24), Solar Pro4: 42.1 (#130)

BenchmarkGemini 3.8 FlashSolar Pro4
LMArena Longer Query15081381

Writing & Preference Gemini 3.8 Flash leads

Gemini 3.8 Flash: 72.2 (#15), Solar Pro4: 56.5 (#138)

BenchmarkGemini 3.8 FlashSolar Pro4
LMArena Text14991386
LMArena Creative Writing14921316
LMArena Multi-Turn15011385
EQ-Bench Creative Writing1748—

Frequently asked questions

Is Gemini 3.8 Flash better than Solar Pro4?

Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 42.1 on the Noometry Index. Solar Pro4 costs 2.9× less per token, which makes it the better buy when Gemini 3.8 Flash's lead doesn't matter for your workload.

Which is cheaper, Gemini 3.8 Flash or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Gemini 3.8 Flash lists at $0.75 and $3.75.

Is Gemini 3.8 Flash or Solar Pro4 better for coding?

Gemini 3.8 Flash scores higher on coding benchmarks: 59.2 versus 40.1 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.8 Flash does, with 1.05M tokens against 524K.

How many benchmarks do Gemini 3.8 Flash and Solar Pro4 share?

18 benchmarks have published results for both models. Gemini 3.8 Flash has 50 scored results on Noometry and Solar Pro4 has 18.

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