GPT-5.3 Codex

OpenAI · Odd ones out, each with one stat no other card can match.

H3 · Maverickrare

Intelligence ▲ higher wins
Intelligence Index: a composite score from 10 hard evaluations covering reasoning, knowledge, coding, agents and science.
32.5
beats 42% of deck
Hallucination ▼ lower wins
Hallucination rate: of the questions a model gets wrong, how often it confidently makes up an answer instead of saying it doesn't know. Lower wins.
89 %
beats 10% of deck
Context ▲ higher wins
Context window: how many tokens of input the model can consider at once.
400K
beats 23% of deck
Knowledge ▲ higher wins
Training-data cutoff: the most recent month the model learned about. Later wins. N/D means the lab hasn't disclosed it, and an N/D card loses this stat.
Aug 2025
beats 58% of deck
Speed ▲ higher wins
Median output speed in tokens per second, measured on the labs' own APIs.
91 tok/s
beats 42% of deck
Response ▼ lower wins
End-to-end response time: seconds to receive a 500-token answer, thinking time included. Lower wins.
75.4 s
beats 26% of deck
Price ▼ lower wins
Blended price per million tokens (3:1 input to output). Lower wins.
$4.81
beats 13% of deck
Modalities ▲ higher wins
Number of supported input and output modalities: text, image, audio and video.
3
beats 45% of deck