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GPT-5 vs Kimi K2.5

Head to head on 18 shared benchmarks, with price, context window, and release dates.

Benchmark scores

81

evals · sort by any column, ⤢ to expand fullscreen

Model
Kimi K2.5

Moonshot AI

68.3%1576elo74.927.9%78.9%13.2%43.7%78.5%39.3%76.4%66.5%49.9%39.6%70.8%74.2%18.9%17.5%81.3%-----96.1-----39.0%---35.8%-----95.4-10421-72.5%77.9%61.4%57.4%77.7%84.9%76.0%------62.0%-----87.1----63.3%--73-67.3%-69.4--26.3%---56.8%
GPT-5

OpenAI

61.1%1623elo72.832.4%68.6%6.6%45.0%83.4%49.6%83.7%65.5%43.7%37.8%74.4%73.4%12.9%20.1%0.0%46.7%91.1%88.0%94.6%48.3%-0.0%0.150.0%68.1%4.58-57.7%80.0%80.0%-91.7%0.0%88.9%83.3%100.0%-48.9%-58.2%-------54.3%37.5%0.521.62100.0%86.1%-0.0%92.7%92.7%93.3%10.0%-82.0%0.0%60.0%0.26-0.0%18.0%-74.9%-2.34-87.5%0.86-54.8%90.0%90.0%56.7%
2 / 2 models
AttributeGPT-5

OpenAI

Kimi K2.5

Moonshot AI

DescriptionOpenAI's August 2025 unified frontier model that auto-routes between a fast model and a deeper "thinking" variant.Kimi K2.5 is an AI model from Kimi.
FamilyGPT 5Kimi
ParamsUndisclosed (closed)-
Open weightsclosedclosed
LicenseProprietaryModified MIT
Released7 Aug 202527 Jan 2026
Context400,000262,144
Input $/1M-$0.60
Output $/1M-$3.00
Cache read $/1M$0.125$0.100
Cache write $/1M--
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiestext, image, filetext, image
Providersopenai-
PublisherOpenAIMoonshot AI
Reported scores

FAQ

Is GPT-5 or Kimi K2.5 better?
Across the 18 benchmarks both models report on Sophon, Kimi K2.5 leads on 10 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do GPT-5 and Kimi K2.5 compare on GPQA Diamond?
GPT-5 scores 68.6% and Kimi K2.5 scores 78.9% on GPQA Diamond.
When were GPT-5 and Kimi K2.5 released?
GPT-5 was released 7 Aug 2025 by OpenAI. Kimi K2.5 was released 27 Jan 2026 by Moonshot AI.

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