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AI summary
Written by AI from the official notes. Check them for exact details.GPT-5.3-Codex-Spark has been deprecated and is no longer available.
- GPT-5.3-Codex-Spark is deprecated as of September 14, 2026.
- Research preview removed from ChatGPT desktop app, Codex CLI, and IDE extension.
- Users should switch to recommended models and update configurations.
Why it matters: Users relying on GPT-5.3-Codex-Spark need to transition to supported models for continued functionality.
Full release notes
GPT-5.3-Codex-Spark was deprecated on September 14, 2026. The research preview is no longer available in the ChatGPT desktop app, Codex CLI, or IDE extension.
Switch to one of the recommended models, and update saved configurations, custom agents, and scripts that select gpt-5.3-codex-spark.
For faster responses with a supported model, see Fast mode.