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Gemini 3.5 Flash vs GPT-5

Head to head on 16 shared benchmarks, with price, context window, and release dates.

Benchmark scores

75

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Model
Gemini 3.5 Flash

Google (Alphabet Inc.)

64.7%71.839.0%92.2%42.7%76.3%55.8%76.6%68.1%31.0%49.9%53.1%74.4%40.9%48.7%95.3%----------26.0%---1087elo-57.9%--------78.9%78.2%64.9%75.6%84.6%88.2%82.0%------76.3%---------------53.1%62.9%---64.3%
GPT-5

OpenAI

61.1%72.832.4%85.4%28.5%73.1%49.6%83.7%65.5%18.0%43.7%42.9%73.4%32.6%20.1%84.8%46.7%91.1%88.0%94.6%94.3%0.0%0.150.0%68.1%4.58-57.7%80.0%80.0%-1623elo-91.7%0.0%88.9%83.3%100.0%48.9%83.4%58.2%-------84.6%37.5%0.521.62100.0%99.4%-0.0%92.7%92.7%93.3%10.0%87.1%0.0%60.0%0.260.0%74.9%74.4%2.3487.5%0.86--54.8%90.0%90.0%61.9%
2 / 2 models
AttributeGemini 3.5 Flash

Google (Alphabet Inc.)

GPT-5

OpenAI

DescriptionGemini 3.5 Flash is an AI model from Google (Alphabet Inc.).OpenAI's August 2025 unified frontier model that auto-routes between a fast model and a deeper "thinking" variant.
FamilyGeminiGPT 5
Params-Undisclosed (closed)
Open weightsclosedclosed
LicenseproprietaryProprietary
Released19 May 20267 Aug 2025
Context1,048,576400,000
Input $/1M$1.50$1.25
Output $/1M$9.00$10.00
Cache read $/1M$0.150$0.125
Cache write $/1M$0.083-
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiestext, image, video, file, audiotext, image, file
Providers-openai
PublisherGoogle (Alphabet Inc.)OpenAI
Reported scores

FAQ

Is Gemini 3.5 Flash or GPT-5 better?
Across the 16 benchmarks both models report on Sophon, Gemini 3.5 Flash leads on 14 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-5 compare on GPQA Diamond?
Gemini 3.5 Flash scores 92.2% and GPT-5 scores 85.4% on GPQA Diamond.
Which is cheaper, Gemini 3.5 Flash or GPT-5?
Gemini 3.5 Flash is cheaper at $9.00 per million output tokens against $10.00 for GPT-5 - about 1.1x.
When were Gemini 3.5 Flash and GPT-5 released?
Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.). GPT-5 was released 7 Aug 2025 by OpenAI.

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