Noometry

Model comparison

Gemini 3 Deep Think vs o3

o3 has enough public results to be ranked (#61); 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 OpenAI

47.5

Rank #61 Confirmed

Summary

  • They share 3 benchmarks with published results for both. Gemini 3 Deep Think scores higher in 1 category and o3 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 32.0.
  • The biggest single-benchmark swing is ARC-AGI-2: 84.6% for Gemini 3 Deep Think and 6.5% for o3.

Side by side

Gemini 3 Deep Thinko3
ProviderGoogleOpenAI
Noometry Index58.347.5
Released2026-02-122025-04-16
WeightsProprietaryProprietary
Context window—200K
Max output—100K
Input $ / M tokens—$2
Output $ / M tokens—$8
Results tracked363

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Category by category

Coding Not comparable

Gemini 3 Deep Think: —, o3: 46.8 (#64)

BenchmarkGemini 3 Deep Thinko3
SWE-bench Verified—62.3%
SWE-bench Verified (bash only)—58.4%
Aider Polyglot—81.3%
GSO—8.8%
WeirdML—52.4%
LMArena Coding—1408
CadEval—74%
ALE-Bench—933.55

Agentic & Tool Use Not comparable

Gemini 3 Deep Think: —, o3: 34.5 (#44)

BenchmarkGemini 3 Deep Thinko3
Berkeley Function Calling Leaderboard—63%
GDPval—30.8%
DeepResearch Bench—45.2%
OSWorld—23%
LMArena Search—1144
METR Time Horizons—65.4%

Reasoning Gemini 3 Deep Think leads

Gemini 3 Deep Think: 70.2 (#14), o3: 32.0 (#78)

BenchmarkGemini 3 Deep Thinko3
ARC-AGI-284.6%6.5%
ARC-AGI-196%60.8%
CritPt25.7%1.4%
SimpleBench—53.1%
Kagi LLM Benchmark—67.6%
Chess Puzzles—38%
EnigmaEval—13.1%
LMArena Hard Prompts—1402
Mystery Game Puzzles—29%
DTBench—84.8%
LMCA—39.7%
Epoch Capabilities Index—146.86
ForecastBench—62.5

Math Not comparable

Gemini 3 Deep Think: —, o3: 50.2 (#58)

BenchmarkGemini 3 Deep Thinko3
FrontierMath (Tiers 1-3)—33.3%
OTIS Mock AIME 2024-2025—84.4%
Omni-MATH—71.4%
LMArena Math—1426
MATH Level 5—97.8%
FrontierMath (Feb 2025 set)—18.7%
FrontierMath Tier 4 (v1)—2.1%

Knowledge Not comparable

Gemini 3 Deep Think: —, o3: 54.6 (#52)

BenchmarkGemini 3 Deep Thinko3
GPQA Diamond—81.8%
Humanity's Last Exam—20.3%
SimpleQA Verified—49.4%
MMLU-Pro—85.9%
Confabulations—14.4%
GPQA (HELM)—75.3%
LMArena Expert—1402

Multimodal Not comparable

Gemini 3 Deep Think: —, o3: 41.4 (#36)

BenchmarkGemini 3 Deep Thinko3
LMArena Vision—1214
GeoBench—74%
VPCT—52%

Multilingual Not comparable

Gemini 3 Deep Think: —, o3: 51.7 (#105)

BenchmarkGemini 3 Deep Thinko3
LMArena Non-English—1401
LMArena Chinese—1437
LMArena French—1430
LMArena German—1420
LMArena Japanese—1403
LMArena Korean—1370
LMArena Russian—1406
LMArena Spanish—1395

Instruction Following Not comparable

Gemini 3 Deep Think: —, o3: 72.8 (#127)

BenchmarkGemini 3 Deep Thinko3
IFEval—86.9%
LMArena Instruction Following—1368

Long Context Not comparable

Gemini 3 Deep Think: —, o3: 53.3 (#6)

BenchmarkGemini 3 Deep Thinko3
Fiction.LiveBench—88.9%
CL-bench—17.8%
LMArena Longer Query—1372

Writing & Preference Not comparable

Gemini 3 Deep Think: —, o3: 63.5 (#64)

BenchmarkGemini 3 Deep Thinko3
LMArena Text—1410
LMArena Creative Writing—1359
Short-Story Creative Writing—83.9%
EQ-Bench Creative Writing—1676
WildBench—86.1%
LMArena Multi-Turn—1405

Frequently asked questions

Is Gemini 3 Deep Think better than o3?

o3 has enough public results to be ranked (#61); Gemini 3 Deep Think does not yet, so treat this comparison as directional.

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

3 benchmarks have published results for both models. Gemini 3 Deep Think has 3 scored results on Noometry and o3 has 63.

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