Noometry

Model comparison

Gemini 3 Deep Think vs o3-mini

o3-mini has enough public results to be ranked (#212); Gemini 3 Deep Think does not yet, so treat this comparison as directional.

Last verified . 3 shared benchmarks.

Gemini 3 Deep Think Google

58.3

Unranked Sparse

o3-mini OpenAI

36.7

Rank #212 Confirmed

Summary

  • They share 3 benchmarks with published results for both. Gemini 3 Deep Think scores higher in 1 category and o3-mini in 0 categories; one gap is clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3 Deep Think leads 70.2 to 16.3.
  • The biggest single-benchmark swing is ARC-AGI-2: 84.6% for Gemini 3 Deep Think and 3% for o3-mini.

Side by side

Gemini 3 Deep Thinko3-mini
ProviderGoogleOpenAI
Noometry Index58.336.7
Released2026-02-122024-12-20
WeightsProprietaryProprietary
Context window—200K
Max output—100K
Input $ / M tokens—$1.10
Output $ / M tokens—$4.40
Results tracked351

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Category by category

Coding Not comparable

Gemini 3 Deep Think: —, o3-mini: 40.8 (#132)

BenchmarkGemini 3 Deep Thinko3-mini
Aider Polyglot—60.4%
SciCode—39.8%
GSO—1.3%
WeirdML—43.7%
LiveBench Coding—82.7%
LMArena Coding—1378
CadEval—54%

Agentic & Tool Use Not comparable

Gemini 3 Deep Think: —, o3-mini: 29.6 (#84)

BenchmarkGemini 3 Deep Thinko3-mini
Cybench—22.5%

Reasoning Gemini 3 Deep Think leads

Gemini 3 Deep Think: 70.2 (#14), o3-mini: 16.3 (#305)

BenchmarkGemini 3 Deep Thinko3-mini
ARC-AGI-284.6%3%
ARC-AGI-196%34.5%
CritPt25.7%0.3%
SimpleBench—22.8%
Chess Puzzles—17%
LiveBench Reasoning—89.6%
LMArena Hard Prompts—1366
Mystery Game Puzzles—7%
DTBench—68.8%
LiveBench Data Analysis—70.6%
LMCA—19%
Epoch Capabilities Index—140.34
ForecastBench—59.6
LiveBench—75.9%

Math Not comparable

Gemini 3 Deep Think: —, o3-mini: 28.1 (#244)

BenchmarkGemini 3 Deep Thinko3-mini
FrontierMath (Tiers 1-3)—18.6%
FrontierMath Tier 4—0%
OTIS Mock AIME 2024-2025—76.9%
LiveBench Math—77.3%
LMArena Math—1396
MATH Level 5—96.5%
FrontierMath (Feb 2025 set)—12.4%
FrontierMath Tier 4 (v1)—4.2%

Knowledge Not comparable

Gemini 3 Deep Think: —, o3-mini: 38.3 (#146)

BenchmarkGemini 3 Deep Thinko3-mini
GPQA Diamond—77%
SimpleQA Verified—15.3%
Confabulations—17.9%
LMArena Expert—1364

Multilingual Not comparable

Gemini 3 Deep Think: —, o3-mini: 45.7 (#164)

BenchmarkGemini 3 Deep Thinko3-mini
LMArena Non-English—1319
LMArena Chinese—1379
LMArena French—1334
LMArena German—1303
LMArena Japanese—1286
LMArena Korean—1314
LMArena Russian—1304
LMArena Spanish—1321

Instruction Following Not comparable

Gemini 3 Deep Think: —, o3-mini: 75.1 (#72)

BenchmarkGemini 3 Deep Thinko3-mini
LiveBench Instruction Following—84.4%
LMArena Instruction Following—1337

Long Context Not comparable

Gemini 3 Deep Think: —, o3-mini: 33.8 (#256)

BenchmarkGemini 3 Deep Thinko3-mini
Fiction.LiveBench—50%
LMArena Longer Query—1343

Writing & Preference Not comparable

Gemini 3 Deep Think: —, o3-mini: 50.3 (#182)

BenchmarkGemini 3 Deep Thinko3-mini
LMArena Text—1337
LMArena Creative Writing—1286
Short-Story Creative Writing—61.7%
LMArena Multi-Turn—1320
LiveBench Language—50.7%

Frequently asked questions

Is Gemini 3 Deep Think better than o3-mini?

o3-mini has enough public results to be ranked (#212); Gemini 3 Deep Think does not yet, so treat this comparison as directional.

How many benchmarks do Gemini 3 Deep Think and o3-mini share?

3 benchmarks have published results for both models. Gemini 3 Deep Think has 3 scored results on Noometry and o3-mini has 51.

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