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Gemini 3.5 Flash vs GPT-5.4

Head to head on 26 shared benchmarks, with price, context window, and release dates.

Benchmark scores

42

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Model
GPT-5.4

OpenAI

65.3%81.0%1272elo78.347.6%92.0%43.7%73.9%82.0%77.5%79.3%70.2%82.6%94.1%88.1%82.8%41.3%77.5%68.3%56.0%43.3%56.6%74.0%57.6%67.4%87.1%13.1%1.4734.1%9.0%1836elo-87.2%78.5%920638652.2%-0.6140.880--65.5%
Gemini 3.5 Flash

Google (Alphabet Inc.)

64.7%26.0%1087elo71.839.0%92.2%42.7%76.3%78.9%78.2%64.9%75.6%84.6%88.2%82.0%76.3%55.8%76.6%68.1%31.0%49.9%53.1%74.4%40.9%48.7%95.3%-----57.9%--------53.1%62.9%64.3%
2 / 2 models
AttributeGemini 3.5 Flash

Google (Alphabet Inc.)

GPT-5.4

OpenAI

DescriptionGemini 3.5 Flash is an AI model from Google (Alphabet Inc.).GPT-5.4 is an AI model from OpenAI.
FamilyGeminiGPT
Params--
Open weightsclosedclosed
Licenseproprietaryproprietary
Released19 May 20265 Mar 2026
Context1,048,5761,050,000
Input $/1M$1.50$2.50
Output $/1M$9.00$15.00
Cache read $/1M$0.150$0.250
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

FAQ

Is Gemini 3.5 Flash or GPT-5.4 better?
Across the 26 benchmarks both models report on Sophon, GPT-5.4 leads on 17 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-5.4 compare on GPQA Diamond?
Gemini 3.5 Flash scores 92.2% and GPT-5.4 scores 92.0% on GPQA Diamond.
Which is cheaper, Gemini 3.5 Flash or GPT-5.4?
Gemini 3.5 Flash is cheaper at $9.00 per million output tokens against $15.00 for GPT-5.4 - about 1.7x.
When were Gemini 3.5 Flash and GPT-5.4 released?
Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.). GPT-5.4 was released 5 Mar 2026 by OpenAI.

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