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GPT-5.4 Mini vs GPT-5.5

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

Benchmark scores

56

evals · sort by any column, ⤢ to expand fullscreen

Model
GPT-5.5

OpenAI

12.9%68.4%1844elo78.251.8%51.7%76.8%13.7%46.1%84.7%82.5%81.1%73.0%87.7%96.3%87.7%68.8%50.0%51.5%47.3%75.0%49.2%57.4%68.1%69.8%69.3%86.2%54.2%36.2%86.0%90.0%100.0%--1315elo34.0%5.7%44.8%24.9%1769elo15.1%51.8%-2.1%92.8%49.1%86.9%88.6%78.7%45.3%100.0%4.258.6%75.7%83.4%-61.9%
GPT-5.4 Mini

OpenAI

37.0%60.9%1662elo7345.4%28.3%60.6%5.9%38.8%70.9%71.6%70.9%60.3%71.5%78.6%72.5%63.5%21.0%50.8%39.6%71.2%18.2%39.6%54.2%48.0%23.4%------21.2%3.9%--------80.3%------------61.748.4%
2 / 2 models
AttributeGPT-5.4 Mini

OpenAI

GPT-5.5

OpenAI

DescriptionGPT-5.4 mini is an AI model from OpenAI.GPT-5.5 is an AI model from OpenAI.
FamilyGPTGPT
Params--
Open weightsclosedclosed
Licenseproprietaryproprietary
Released17 Mar 202623 Apr 2026
Context400,0001,050,000
Input $/1M$0.75$5.00
Output $/1M$4.50$30.00
Cache read $/1M$0.075$0.500
Cache write $/1M--
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiesfile, image, textfile, image, text
Providers--
PublisherOpenAIOpenAI
Reported scores
GPQA Diamond60.6% (AA)
IFBench38.8% (AA)
SciCode39.6% (AA)

FAQ

Is GPT-5.4 Mini or GPT-5.5 better?
Across the 26 benchmarks both models report on Sophon, GPT-5.5 leads on 25 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do GPT-5.4 Mini and GPT-5.5 compare on GPQA Diamond?
GPT-5.4 Mini scores 60.6% and GPT-5.5 scores 76.8% on GPQA Diamond.
Which is cheaper, GPT-5.4 Mini or GPT-5.5?
GPT-5.4 Mini is cheaper at $4.50 per million output tokens against $30.00 for GPT-5.5 - about 6.7x.
When were GPT-5.4 Mini and GPT-5.5 released?
GPT-5.4 Mini was released 17 Mar 2026 by OpenAI. GPT-5.5 was released 23 Apr 2026 by OpenAI.

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