Introducing GPT-5.3-Codex-Spark
This changes everything for developers with real-time, blazing-fast code generation.
Deep Dive
OpenAI has launched GPT-5.3-Codex-Spark, its first real-time coding model, now in research preview for ChatGPT Pro users. The model boasts a massive 15x speed increase in code generation and a 128k token context window, allowing it to handle significantly larger projects and provide near-instantaneous coding assistance. This marks a major leap in AI-powered development tools, moving from conversational coding to a truly interactive, real-time experience.
Why It Matters
It dramatically accelerates developer workflows, potentially changing how software is built by making AI a real-time pair programmer.