o4-mini
Released
o4-mini is an AI model released by OpenAI on Wednesday, Apr 16 2025, the same day as o3. Benchmark results (shown below) cover BullshitBench v2.
API pricing
- InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
- $1.10
- Cached inputA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
- $0.275
- OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
- $4.40
Benchmarks
Compare o4-mini with
Suggested comparisons
Frequently asked questions
o4-mini was released by OpenAI on Wednesday, Apr 16 2025.
o4-mini was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
o4-mini costs $1.10 per million input tokens and $4.40 per million output tokens through the OpenAI API. Cached input is $0.275 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.
o4-mini reports 1 tracked benchmark score — BullshitBench v2: 8%. Scores are the figures published at release by OpenAI.
No. o4-mini 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 o3 on Apr 16 2025. It was followed by o4-mini-high on Apr 16 2025.