[OpenAI · openai.com](<https://openai.com/index/introducing-gpt-5-3-codex-spark/>)

# Introducing GPT-5.3-Codex-Spark

Introducing GPT-5.3-Codex-Spark—our first real-time coding model. 15x faster generation, 128k context, now in research preview for ChatGPT Pro users.

1. [New Releases · OpenAI](<https://curation.space/openai/new-releases>)