OpenAI o4-mini is a

generative pre-trained transformer A generative pre-trained transformer (GPT) is a type of large language model (LLM) and a prominent framework for generative artificial intelligence. It is an Neural network (machine learning), artificial neural network that is used in natural ...

model created by

OpenAI OpenAI, Inc. is an American artificial intelligence (AI) organization founded in December 2015 and headquartered in San Francisco, California. It aims to develop "safe and beneficial" artificial general intelligence (AGI), which it defines ...

. On April 16, 2025, the o4-mini model was released to all

ChatGPT ChatGPT is a generative artificial intelligence chatbot developed by OpenAI and released on November 30, 2022. It uses large language models (LLMs) such as GPT-4o as well as other Multimodal learning, multimodal models to create human-like re ...

users (including free-tier users) as well as via the Chat Completions

API An application programming interface (API) is a connection between computers or between computer programs. It is a type of software interface, offering a service to other pieces of software. A document or standard that describes how to build ...

and Responses API. Additionally, OpenAI introduced the o4-mini-high model, which was made available exclusively to paid-tier ChatGPT users. The high model offers more advanced features, including higher response accuracy and faster processing times. Unlike earlier models, o4-mini is capable of processing both text and images. It also allows to perform tasks like analyzing whiteboard sketches during its "chain-of-thought" phase. o4-mini API providers says that it's designed to enhance decision-making across sectors by enabling utilities to forecast demand and analyze infrastructure data, supporting healthcare through extraction and interpretation of medical records and diagnostics, and assisting financial institutions with real-time regulatory compliance and risk assessment through automated document analysis and data processing.

References

Large language models 2025 software Generative pre-trained transformers OpenAI ChatGPT 2025 in artificial intelligence {{ai-stub