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GPT-5.4 vs Kimi K2.5

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

Benchmark scores

48

evals · sort by any column, ⤢ to expand fullscreen

Model
GPT-5.4

OpenAI

65.3%81.0%1836elo78.347.6%74.8%11.3%48.4%78.5%9206382.0%77.5%79.3%70.2%82.6%94.1%88.1%82.8%41.3%77.5%68.3%43.3%47.1%74.0%37.9%8067.4%36.0%-13.1%1.4734.1%9.0%1272elo-87.2%--8652.2%-56.0%-0.6140.8----60.3%
Kimi K2.5

Moonshot AI

68.3%39.0%1576elo74.927.9%78.9%13.2%43.7%78.5%1042172.5%77.9%61.4%57.4%77.7%84.9%76.0%62.0%39.3%76.4%66.5%49.9%39.6%74.2%18.9%69.417.5%81.3%96.1-----35.8%-95.487.1--63.3%---7367.3%70.8%26.3%56.8%
2 / 2 models
AttributeGPT-5.4

OpenAI

Kimi K2.5

Moonshot AI

DescriptionGPT-5.4 is an AI model from OpenAI.Kimi K2.5 is an AI model from Kimi.
FamilyGPTKimi
Params--
Open weightsclosedclosed
LicenseproprietaryModified MIT
Released5 Mar 202627 Jan 2026
Context1,050,000262,144
Input $/1M$2.50$0.60
Output $/1M$15.00$3.00
Cache read $/1M$0.250$0.100
Cache write $/1M--
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiestext, image, filetext, image
Providers--
PublisherOpenAIMoonshot AI
Reported scores

FAQ

Is GPT-5.4 or Kimi K2.5 better?
Across the 28 benchmarks both models report on Sophon, GPT-5.4 leads on 21 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do GPT-5.4 and Kimi K2.5 compare on GPQA Diamond?
GPT-5.4 scores 74.8% and Kimi K2.5 scores 78.9% on GPQA Diamond.
Which is cheaper, GPT-5.4 or Kimi K2.5?
Kimi K2.5 is cheaper at $3.00 per million output tokens against $15.00 for GPT-5.4 - about 5.0x.
When were GPT-5.4 and Kimi K2.5 released?
GPT-5.4 was released 5 Mar 2026 by OpenAI. Kimi K2.5 was released 27 Jan 2026 by Moonshot AI.

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