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.

Yesterday, #OpenAI released GPT-5.3-Codex-Spark as a research project for Pro users. With the big announcements coming from China with the releases of #GLM 5, #MiniMax 2.5, plus the hype #Seendance and #Kling are generating, it might seem less relevant.

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