When was o4-mini-high released?

o4-mini-high was released by OpenAI on Wednesday, Apr 16 2025.

Who made o4-mini-high?

o4-mini-high was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

Is o4-mini-high open source?

No. o4-mini-high is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

What came before and after o4-mini-high?

OpenAI's previous tracked release was o4-mini on Apr 16 2025. It was followed by o3-pro on Jun 10 2025.

o4-mini-high

Released Apr 16 2025

o4-mini-high is an AI model released by OpenAI on Wednesday, Apr 16 2025, the same day as o4-mini.

Available from


OpenAI	$1.10	$4.40	200K

USD per 1M tokens

Compare o4-mini-high with

o4-mini-high

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Frequently asked questions

: o4-mini-high was released by OpenAI on Wednesday, Apr 16 2025.
: o4-mini-high was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
: No. o4-mini-high is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
: OpenAI's previous tracked release was o4-mini on Apr 16 2025. It was followed by o3-pro on Jun 10 2025.