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5.3-Codex

Introducing GPT-5.3-Codex-Spark

February 12, 2026Product ReleasesView original ↗
$npx -y @buildinternet/releases show rel_r6qC4FkQu7y999YKnZhjb

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.

Fetched April 7, 2026