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Model Comparison

GPT 5.3 Codex vs Kimi K3

GPT 5.3 Codex ranks #68 on the AI IQ leaderboard with an estimated IQ of 112, while Kimi K3 ranks #22 on the AI IQ leaderboard with an estimated IQ of 127. 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 K3 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 K3Kimi
Rank#68#22
IQ112127
Abstract Reasoning84106
Mathematical Reasoning103136
Academic Reasoning129132
Programmatic Reasoning124136
Computer Use113129
Reliability115121
Knowledge Work113127
Emotional Reasoning—133
Effective Cost / 1M Tokens$18.57$20.20
Sticker Price / 1M I/O Tokens$15.75$18.00
Speed103 tok/s54 tok/s
Context Window400K1.0M
Released2026-02-052026-07-16
Open WeightsNoYes
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