OpenAI has released o3 and o4-mini, their most powerful reasoning models. These models outperform their predecessors while delivering answers in under a minute. OpenAI also launched Codex CLI, an open-source terminal tool, with a $1 million fund to support related projects.

o3 $10/mil tokens input, $40/mil tokens output
o4-mini $1.1/mil tokens input, $4.4/mil tokens output