OpenAI Releases Advanced Reasoning Models o3 and o4-mini, Launches Codex CLI for AI Coding

67 posts • OpenAI (o1)

Updated Apr 16, 2025, 06:48 PM

OpenAI has released two new AI reasoning models, o3 and o4-mini, representing significant advancements in artificial intelligence capabilities. These models are designed for deep reasoning, excelling in complex tasks such as mathematics, coding, science, and multimodal image analysis. The o3 model is OpenAI's most advanced reasoning model to date, offering powerful problem-solving abilities and innovative thinking. The o4-mini model provides strong performance while prioritizing efficiency and speed, making it a cost-effective alternative suitable for everyday tasks. Both models can agentically use and combine tools within ChatGPT, including web search, Python programming, image analysis, file interpretation, and image generation. They are the first OpenAI models capable of reasoning with images in their chain of thought, marking a breakthrough in visual perception capabilities. In addition, OpenAI has introduced Codex CLI, an open-source coding agent that operates in the command line interface. Codex CLI enables developers to write, edit, and execute code using natural language commands, integrating AI models like o3 and o4-mini into terminal environments to streamline coding workflows. The new models and Codex CLI are being incrementally made available to users starting today, both through the API and within ChatGPT. OpenAI aims for these releases to enhance users' ability to solve complex technical problems, advance AI reasoning, and bring the technology closer to achieving artificial general intelligence.

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Sources

techcrunch.com(8)techmeme.com(5)openai.com(4)theinformation.com(3)

VentureBeat

@VentureBeat

OpenAI launches o3 and o4-mini, AI models that 'think with images' and use tools autonomously https://t.co/7GmQ533Ztw

Critiqs AI

@critiqsai

New coding agent from OpenAI: Codex CLI https://t.co/2P3ehtXMdw

Alex Volkov (Thursd/AI)

@altryne

o3 and o4-mini, the new flagship reasoners from OpenAI that launched today (April 16) are SOTA across a bunch of benchmarks as validated independently by SEAL from ScaleAI https://t.co/VtsUvi056H https://t.co/6g4lRz1ptP