Noometry

Model comparison

Gemini 3.1 Flash Lite vs Gemini 3 Deep Think

Gemini 3.1 Flash Lite has enough public results to be ranked (#144); Gemini 3 Deep Think does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

Gemini 3.1 Flash Lite Google

40.8

Rank #144 Confirmed

Gemini 3 Deep Think Google

58.3

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. Gemini 3.1 Flash Lite scores higher in 0 categories and Gemini 3 Deep Think in 1 category; one gap is clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3 Deep Think leads 70.2 to 22.9.
  • The biggest single-benchmark swing is CritPt: 1.1% for Gemini 3.1 Flash Lite and 25.7% for Gemini 3 Deep Think.

Side by side

Gemini 3.1 Flash LiteGemini 3 Deep Think
ProviderGoogleGoogle
Noometry Index40.858.3
Released2026-03-032026-02-12
WeightsProprietaryProprietary
Context window1.05M—
Max output66K—
Input $ / M tokens$0.25—
Output $ / M tokens$1.50—
Results tracked383

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Category by category

Coding Not comparable

Gemini 3.1 Flash Lite: 37.8 (#188), Gemini 3 Deep Think: —

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
LMArena WebDev1256—
SciCode41.9%—
WeirdML52.2%—
LMArena Coding1400—
ALE-Bench797.73—

Agentic & Tool Use Not comparable

Gemini 3.1 Flash Lite: 30.2 (#79), Gemini 3 Deep Think: —

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
DeepResearch Bench37.3%—

Reasoning Gemini 3 Deep Think leads

Gemini 3.1 Flash Lite: 22.9 (#186), Gemini 3 Deep Think: 70.2 (#14)

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
CritPt1.1%25.7%
ARC-AGI-2—84.6%
Kagi LLM Benchmark67.2%—
NYT Connections (extended)8.2%—
ARC-AGI-1—96%
Chess Puzzles25%—
EnigmaEval3%—
Thematic Generalization63.3%—
LMArena Hard Prompts1407—
DTBench76.8%—
LMCA35%—
Epoch Capabilities Index144.47—
ForecastBench54.4—

Math Not comparable

Gemini 3.1 Flash Lite: 40.7 (#90), Gemini 3 Deep Think: —

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
FrontierMath (Tiers 1-3)27.7%—
OTIS Mock AIME 2024-202580%—
LMArena Math1428—

Knowledge Not comparable

Gemini 3.1 Flash Lite: 41.9 (#104), Gemini 3 Deep Think: —

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
GPQA Diamond81.8%—
Humanity's Last Exam8.6%—
Vectara Hallucination Rate8.2%—
LMArena Expert1398—

Multimodal Not comparable

Gemini 3.1 Flash Lite: 39.4 (#60), Gemini 3 Deep Think: —

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
LMArena Vision1240—

Multilingual Not comparable

Gemini 3.1 Flash Lite: 52.3 (#86), Gemini 3 Deep Think: —

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
LMArena Non-English1411—
LMArena Chinese1461—
LMArena French1424—
LMArena German1429—
LMArena Japanese1413—
LMArena Korean1392—
LMArena Russian1420—
LMArena Spanish1421—

Instruction Following Not comparable

Gemini 3.1 Flash Lite: 72.7 (#131), Gemini 3 Deep Think: —

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
LMArena Instruction Following1377—

Long Context Not comparable

Gemini 3.1 Flash Lite: 42.5 (#122), Gemini 3 Deep Think: —

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
LMArena Longer Query1394—

Writing & Preference Not comparable

Gemini 3.1 Flash Lite: 60.9 (#94), Gemini 3 Deep Think: —

BenchmarkGemini 3.1 Flash LiteGemini 3 Deep Think
LMArena Text1416—
LMArena Creative Writing1401—
LMArena Multi-Turn1417—

Frequently asked questions

Is Gemini 3.1 Flash Lite better than Gemini 3 Deep Think?

Gemini 3.1 Flash Lite has enough public results to be ranked (#144); Gemini 3 Deep Think does not yet, so treat this comparison as directional.

How many benchmarks do Gemini 3.1 Flash Lite and Gemini 3 Deep Think share?

1 benchmark has published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and Gemini 3 Deep Think has 3.

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