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Gemini 3.5 Flash vs GPT-4o

Head to head on 14 shared benchmarks, with price, context window, and release dates.

Benchmark scores

48

evals · sort by any column, ⤢ to expand fullscreen

Model
Gemini 3.5 Flash

Google (Alphabet Inc.)

64.7%39.0%92.2%42.7%76.3%78.9%78.2%75.6%84.6%68.1%53.1%74.4%40.9%95.3%------26.0%-1087elo71.857.9%--64.9%88.2%82.0%--76.3%55.8%-76.6%--31.0%49.9%----53.1%62.9%48.7%-64.3%
GPT-4o

OpenAI

45.9%0.3%54.3%2.4%34.3%55.1%46.1%70.1%49.0%57.4%33.3%74.5%8.3%25.1%18.2%15.0%6.0%380.0%0.33-6.1%---96.10.0%---30.9%75.9%--10.8%-74.8%54.0%--5.7121.6%61.20.98---32.5%33.4%
2 / 2 models
AttributeGemini 3.5 Flash

Google (Alphabet Inc.)

GPT-4o

OpenAI

DescriptionGemini 3.5 Flash is an AI model from Google (Alphabet Inc.).GPT-4o is an AI model from OpenAI.
FamilyGeminiGPT
Params--
Open weightsclosedclosed
Licenseproprietaryproprietary
Released19 May 202620 Nov 2024
Context1,048,576128,000
Input $/1M$1.50$2.50
Output $/1M$9.00$10.00
Cache read $/1M$0.150$1.250
Cache write $/1M$0.083-
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiestext, image, video, file, audiotext, image, file
Providers--
PublisherGoogle (Alphabet Inc.)OpenAI
Reported scores
Taubench61.2 pass^1
GSM8K96.1 Accuracy
ScholarSearch5.71 Social Sciences & Humanities (%)
AIME202438 pass@1

FAQ

Is Gemini 3.5 Flash or GPT-4o better?
Across the 14 benchmarks both models report on Sophon, Gemini 3.5 Flash leads on 13 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do Gemini 3.5 Flash and GPT-4o compare on GPQA Diamond?
Gemini 3.5 Flash scores 92.2% and GPT-4o scores 54.3% on GPQA Diamond.
Which is cheaper, Gemini 3.5 Flash or GPT-4o?
Gemini 3.5 Flash is cheaper at $9.00 per million output tokens against $10.00 for GPT-4o - about 1.1x.
When were Gemini 3.5 Flash and GPT-4o released?
Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.). GPT-4o was released 20 Nov 2024 by OpenAI.

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