OpenAI o4 vs o3: What the New Reasoning King Brings

OpenAI o4OpenAI o3
arenaElo14381418
humanEval9492.4
sweBench7269.1
mmlu92.590.2
gpqa87.183.3
aime9491.6
Price in/out ($/M)$12 / $48$10 / $40

Our verdict

o4 tops o3 on every reasoning benchmark (GPQA 87 vs 83, MMLU 92.5 vs 90.2) at a ~20% lower list price. Unless you have o3 pinned by contract, o4 is a straight upgrade for reasoning-heavy agents.

OpenAI o4 · OpenAI o3 · All AI model comparisons