o3 and o4-mini

OpenAI released o3 and o4-mini, its smartest models to date, which can agentically use and combine every tool within ChatGPT, including web search, Python analysis of uploaded files, visual reasoning and image generation. OpenAI says o3 makes 20 percent fewer major errors than o1 on difficult, real-world tasks as judged by external experts, while o4-mini is a smaller, cost-efficient model that achieves 99.5% pass@1 on AIME 2025 with a Python interpreter. The company also introduced Codex CLI, an open-source coding agent for the terminal, and a $1 million grant initiative in $25,000 increments of API credits. OpenAI reports that both models remain below the "High" threshold of its Preparedness Framework in biological and chemical, cybersecurity, and AI self-improvement risk areas.