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Model Comparison

GPT 5.3 Codex vs Kimi K2.5

GPT 5.3 Codex ranks #68 on the AI IQ leaderboard with an estimated IQ of 112, while Kimi K2.5 ranks #82 on the AI IQ leaderboard with an estimated IQ of 110. The table below puts the two models side by side across the seven capability dimensions, emotional reasoning, cost, speed, and context window.

GPT 5.3 Codex profile →Kimi K2.5 profile →
Where They Sit on the IQ Bell Curve
Both models highlighted on the standard normal IQ distribution of every tracked model
IQ Dimensions Head to Head
The seven scored Composite IQ dimensions, side by side
Domains Head to Head
Applied domain composite scores where at least one model is measured
GPT 5.3 CodexOpenAIKimi K2.5Kimi
Rank#68#82
IQ112110
Abstract Reasoning8481
Mathematical Reasoning103110
Academic Reasoning129122
Programmatic Reasoning124114
Computer Use113116
Reliability115112
Knowledge Work113111
Emotional Reasoning—115
Effective Cost / 1M Tokens$18.57$2.79
Sticker Price / 1M I/O Tokens$15.75$3.35
Speed103 tok/s81 tok/s
Context Window400K—
Released2026-02-052026-01-27
Open WeightsNoYes
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