GPT-5.3-Codex-Spark changelog

Every change to GPT-5.3-Codex-Spark that Modelpeers has recorded, newest first, each with the source it came from. The record starts Sep 14, 2026.

All (1)Retiring (1)

September 2026

GPT-5.3-Codex-Spark and OpenAI Codex

2 products from OpenAI

RetiredSep 14, 2026

GPT-5.3-Codex-Spark research preview retired

GPT-5.3-Codex-Spark was deprecated on September 14, 2026 and is no longer available in the ChatGPT desktop app, Codex CLI or IDE extension.

Who is affected:: Codex users and scripts that select gpt-5.3-codex-spark.
Action needed:: Switch to a recommended model. Use Fast mode for speed.

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