🚀 OpenAI's frontier has moved on
O4 Mini and O3 Mini are legacy reasoning models. OpenAI's current line is the GPT-5.x generation, led by GPT-5.3-Codex for agentic coding. For the current model, see the GPT-5.3-Codex overview →
About 2 min
OpenAI has released GPT-5.3-Codex, its most capable agentic coding model to date. Announced on February 5, 2026, this revolutionary model represents a significant leap forward in AI-powered software development, combining frontier coding performance with advanced reasoning and professional knowledge capabilities. Available through Codex desktop app, plugins, and pi-coding-agent authentication, GPT-5.3-Codex is transforming how developers interact with AI coding assistants.
About 6 min
On February 5, 2026, two of the world's most powerful AI models were released simultaneously: OpenAI's GPT-5.3-Codex and Anthropic's Claude Opus 4.6. Both models represent the cutting edge of AI-assisted development, each with unique strengths and capabilities. This comprehensive comparison helps developers and teams choose the right model for their specific needs.
About 8 min