OpenAI Launches GPT-5.3 Codex, First AI Model That Helped Create Itself Through Self-Debugging
Summary
OpenAI releases GPT-5.3 Codex, a groundbreaking AI coding model that runs 25% faster than its predecessor and remarkably helped create itself through self-debugging capabilities, launching just minutes after competitor Anthropic in a dramatic race to market.
Key Points
- OpenAI launches GPT-5.3 Codex, an agentic coding model that can create complex games and apps from scratch and perform nearly any task developers do on computers
- The new model runs 25% faster than its predecessor GPT-5.2 and represents OpenAI's first model that was instrumental in creating itself through self-debugging
- OpenAI releases the model just minutes after competitor Anthropic moved up their own agentic coding tool launch by 15 minutes to beat the originally planned simultaneous 10 a.m. PST release