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Model Comparison

Gemini 4 Carbon vs GPT 5.3 Codex

Gemini 4 Carbon ranks #5 on the AI IQ leaderboard with an estimated IQ of 139, while GPT 5.3 Codex ranks #68 on the AI IQ leaderboard with an estimated IQ of 112. The table below puts the two models side by side across the seven capability dimensions, emotional reasoning, cost, speed, and context window.

Gemini 4 Carbon profile →GPT 5.3 Codex 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
Gemini 4 CarbonGoogleGPT 5.3 CodexOpenAI
Rank#5#68
IQ139112
Abstract Reasoning12084
Mathematical Reasoning145103
Academic Reasoning136129
Programmatic Reasoning153124
Computer Use155113
Reliability135115
Knowledge Work130113
Emotional Reasoning——
Effective Cost / 1M Tokens—$18.57
Sticker Price / 1M I/O Tokens—$15.75
Speed—103 tok/s
Context Window—400K
Released2026-10-282026-02-05
Open WeightsNoNo
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