OpenAI's small-but-mighty reasoning model — o1-class thinking at a fraction of the cost and latency.
o4-mini is OpenAI's compact reasoning model: it keeps most of o1's deliberative strength while replying far faster and cheaper. It's the default 'smart but quick' option for coding assist, math help, and agent loops where you can't wait.
Who it's for: Developers and students who want reasoning quality without o1's latency and price — ideal for agentic workflows and high-volume calls.
Near-o1 quality at a fraction of latency.
Much cheaper per token than full o1.
Great for multi-step tool-using loops.
Strong on real-world code tasks.
For almost everything except the very hardest reasoning, o4-mini is the sweet spot — cheap, fast, and genuinely smart. Pair with o3 when you need maximum depth.