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GPT-5.4 vs GPT-5.5

Head to head on 28 shared benchmarks, with price, context window, and release dates.

Benchmark scores

63

evals · sort by any column, ⤢ to expand fullscreen

Model
GPT-5.5

OpenAI

12.9%68.4%86.0%1315elo1844elo78.251.7%76.8%13.7%46.1%84.7%82.5%81.1%73.0%87.7%96.3%87.7%92.8%49.1%86.9%68.8%50.0%51.5%47.3%75.0%49.2%69.8%69.3%86.2%54.2%36.2%-90.0%100.0%--34.0%51.8%5.7%44.8%24.9%1769elo-15.1%51.8%--2.1%88.6%--78.7%45.3%100.0%-4.2-58.6%75.7%83.4%-57.4%68.1%61.9%
GPT-5.4

OpenAI

13.1%65.3%81.0%1272elo1836elo78.347.6%74.8%11.3%48.4%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%47.1%74.0%37.9%67.4%36.0%---1.47--34.1%9.0%------87.2%--78.5%92063--8652.2%----0.61-40.8---80--60.3%
2 / 2 models
AttributeGPT-5.4

OpenAI

GPT-5.5

OpenAI

DescriptionGPT-5.4 is an AI model from OpenAI.GPT-5.5 is an AI model from OpenAI.
FamilyGPTGPT
Params--
Open weightsclosedclosed
Licenseproprietaryproprietary
Released5 Mar 202623 Apr 2026
Context1,050,0001,050,000
Input $/1M$2.50$5.00
Output $/1M$15.00$30.00
Cache read $/1M$0.250$0.500
Cache write $/1M--
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiestext, image, filefile, image, text
Providers--
PublisherOpenAIOpenAI
Reported scores

FAQ

Is GPT-5.4 or GPT-5.5 better?
Across the 28 benchmarks both models report on Sophon, GPT-5.5 leads on 23 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do GPT-5.4 and GPT-5.5 compare on GPQA Diamond?
GPT-5.4 scores 74.8% and GPT-5.5 scores 76.8% on GPQA Diamond.
Which is cheaper, GPT-5.4 or GPT-5.5?
GPT-5.4 is cheaper at $15.00 per million output tokens against $30.00 for GPT-5.5 - about 2.0x.
When were GPT-5.4 and GPT-5.5 released?
GPT-5.4 was released 5 Mar 2026 by OpenAI. GPT-5.5 was released 23 Apr 2026 by OpenAI.

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