Noometry

Model comparison

Gemini 3.5 Flash vs GPT-4o

Gemini 3.5 Flash is the stronger model overall, scoring 54.2 to 28.6 on the Noometry Index.

Last verified . 35 shared benchmarks.

Gemini 3.5 Flash Google

54.2

Rank #32 Confirmed

GPT-4o OpenAI

28.6

Rank #324 Confirmed

Summary

  • They share 35 benchmarks with published results for both. Gemini 3.5 Flash scores higher in 10 categories and GPT-4o in 0 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3.5 Flash leads 62.8 to 9.4.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 95.6% for Gemini 3.5 Flash and 6.4% for GPT-4o.
  • Gemini 3.5 Flash is cheaper at $1.50 / $9 per million input/output tokens, against $2.50 / $10 for GPT-4o.
  • Gemini 3.5 Flash accepts more context: 1.05M tokens versus 128K.

Side by side

Gemini 3.5 FlashGPT-4o
ProviderGoogleOpenAI
Noometry Index54.228.6
Released2026-05-192024-05-13
WeightsProprietaryProprietary
Context window1.05M128K
Max output66K16K
Input $ / M tokens$1.50$2.50
Output $ / M tokens$9$10
Results tracked5472

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Category by category

Coding Gemini 3.5 Flash leads

Gemini 3.5 Flash: 49.4 (#49), GPT-4o: 24.8 (#328)

BenchmarkGemini 3.5 FlashGPT-4o
SWE-bench Verified79.3%31%
WeirdML62.6%25.1%
LMArena Coding14921297
DeepSWE37.4%—
SWE-bench Verified (bash only)—21.6%
Aider Polyglot—45.3%
LMArena WebDev1499—
SciCode53.1%—
GSO—0%
BigCodeBench Instruct—51.1%
LiveBench Coding—51.4%
BigCodeBench Complete—61.1%
CadEval—26%
ALE-Bench911.02—
HumanEval+—87.2%
MBPP+—72.2%

Agentic & Tool Use Gemini 3.5 Flash leads

Gemini 3.5 Flash: 24.7 (#114), GPT-4o: 21.0 (#141)

BenchmarkGemini 3.5 FlashGPT-4o
APEX-Agents27.5%—
GDPval—9.9%
TheAgentCompany—8.6%
Cybench—12.5%
BALROG—32.3%
GBAEval6.7%—
GDP.pdf14%—
LMArena Search—1006
METR Time Horizons—40.8%
Vending-Bench 25,396—

Reasoning Gemini 3.5 Flash leads

Gemini 3.5 Flash: 62.8 (#18), GPT-4o: 9.4 (#343)

BenchmarkGemini 3.5 FlashGPT-4o
ARC-AGI-272.1%0%
SimpleBench76.7%17.8%
ARC-AGI-192.5%4.5%
CritPt13.1%0%
Chess Puzzles50%13%
EnigmaEval25.4%0.8%
LMArena Hard Prompts14881281
DTBench94.7%64.5%
LMCA47.1%16.6%
Epoch Capabilities Index154.46128.97
ForecastBench5957.7
NYT Connections (extended)92.6%—
EBR-Bench4.8%—
LiveBench Reasoning—55.8%
Mystery Game Puzzles32%—
LiveBench Data Analysis—60.9%
Surface Evolver Bench58.1%—
LiveBench—55.3%

Math Gemini 3.5 Flash leads

Gemini 3.5 Flash: 60.7 (#36), GPT-4o: 10.6 (#312)

BenchmarkGemini 3.5 FlashGPT-4o
FrontierMath (Tiers 1-3)62.8%0.4%
OTIS Mock AIME 2024-202595.6%6.4%
LMArena Math15041285
FrontierMath (Feb 2025 set)39%0.3%
FrontierMath Tier 426.8%—
MathArena Final-Answer Competitions76.3%—
ProofBench31%—
Omni-MATH—29.3%
LiveBench Math—49.5%
MATH Level 5—53.3%
FrontierMath Tier 4 (v1)14.6%—

Knowledge Gemini 3.5 Flash leads

Gemini 3.5 Flash: 66.3 (#11), GPT-4o: 28.8 (#242)

BenchmarkGemini 3.5 FlashGPT-4o
GPQA Diamond92.8%49.2%
SimpleQA Verified66.2%26%
LMArena Expert14951250
Humanity's Last Exam—2.7%
MMLU-Pro—71.3%
Confabulations—15.3%
Vectara Hallucination Rate—9.6%
GPQA (HELM)—52%
MMLU—88.1%

Multimodal Gemini 3.5 Flash leads

Gemini 3.5 Flash: 45.7 (#15), GPT-4o: 34.5 (#91)

BenchmarkGemini 3.5 FlashGPT-4o
LMArena Vision13101137
Video-MME—71.9%
GeoBench—71%
VPCT—40%
Blueprint-Bench 233.6%—
LMArena Document1463—
ScienceQA—88.5%

Multilingual Gemini 3.5 Flash leads

Gemini 3.5 Flash: 57.0 (#13), GPT-4o: 43.2 (#186)

BenchmarkGemini 3.5 FlashGPT-4o
LMArena Non-English14761283
LMArena Chinese15261277
LMArena French14901304
LMArena German14921282
LMArena Japanese14861257
LMArena Korean14511234
LMArena Russian14931286
LMArena Spanish14801292

Instruction Following Gemini 3.5 Flash leads

Gemini 3.5 Flash: 77.0 (#30), GPT-4o: 66.6 (#207)

BenchmarkGemini 3.5 FlashGPT-4o
LMArena Instruction Following14671278
LiveBench Instruction Following—68.6%
IFEval—81.7%

Long Context Gemini 3.5 Flash leads

Gemini 3.5 Flash: 45.4 (#38), GPT-4o: 39.4 (#179)

BenchmarkGemini 3.5 FlashGPT-4o
LMArena Longer Query14821289
Fiction.LiveBench—66.7%

Writing & Preference Gemini 3.5 Flash leads

Gemini 3.5 Flash: 65.5 (#47), GPT-4o: 52.6 (#166)

BenchmarkGemini 3.5 FlashGPT-4o
LMArena Text14821300
LMArena Creative Writing14701292
LMArena Multi-Turn14811302
Short-Story Creative Writing—81.8%
WildBench—82.8%
EQ-Bench 41087—
LiveBench Language—47.6%

Frequently asked questions

Is Gemini 3.5 Flash better than GPT-4o?

Gemini 3.5 Flash is the stronger model overall, scoring 54.2 to 28.6 on the Noometry Index.

Which is cheaper, Gemini 3.5 Flash or GPT-4o?

Gemini 3.5 Flash is cheaper. It lists at $1.50 per million input tokens and $9 per million output tokens; GPT-4o lists at $2.50 and $10.

Is Gemini 3.5 Flash or GPT-4o better for coding?

Gemini 3.5 Flash scores higher on coding benchmarks: 49.4 versus 24.8 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.5 Flash does, with 1.05M tokens against 128K.

How many benchmarks do Gemini 3.5 Flash and GPT-4o share?

35 benchmarks have published results for both models. Gemini 3.5 Flash has 54 scored results on Noometry and GPT-4o has 72.

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