On December 26, 2025, Tibo, a member of the Codex team, took the lead in announcing the launch of a special holiday version model GPT-5.2-Codex-XMas, stating that the model is completely consistent with GPT-5.2-Codex in terms of capabilities, with only Christmas-themed personified output. The news was subsequently retweeted by OpenAI co-founder Greg Brockman with the caption "Santa mode for Codex," which was seen as an official endorsement of the release.
From the examples shown, GPT-5.2-Codex-XMas can be called through codex -m gpt-5.2-codex-xmas, with the main changes being reflected in the terminal welcome message and conversation style, emphasizing the festive atmosphere rather than technical capability upgrades. This release does not announce new context specifications or interface adjustments, and is positioned more towards seasonal experience updates. The duration of this Christmas mode has not yet been officially stated, but it is seen as a lightweight, limited-time official release as a whole.
FAQs
Q: Who first released GPT-5.2-Codex-XMas?
A: It was first published on social platforms by Tibo, a member of the Codex team.
Q: What role did Greg Brockman play in this?
A: Greg Brockman retweeted the tweet with a confirmation, which attracted widespread attention.
Q: Is GPT-5.2-Codex-XMas an official model?
A: The release came from a member of the Codex team and was forwarded by the OpenAI co-founder to confirm it.
Q: Is there a performance difference between this model and GPT-5.2-Codex?
A: There is no difference in performance, the main difference is the festive output style.
Q: Is this a long-term available model?
A: At present, it is more like a festival-limited model, and it is not clear whether it will be retained for a long time.
