Ask HN: GPT-5.3-Codex being silently routed to GPT-5.2?

Hi, i'm on codex pro plan and it silently routes to 5.2 today, WTF? Anyone else gets similar behaviour? I was working with it since morning (UTC) and afternoon sudenly it became much slower and got very different feeling, so I started digging and enabled codex logs and got:

  2026-02-12T20:41:12.751950Z TRACE codex_api::sse::responses: SSE event: {"type":"response.completed","response":{"id":"resp_0fc56e20d02a6b5701698e3ae51fac8191a5bae8fc9962662c","object":"response","created_at":1770928869,"status":"completed","background":false,"completed_at":1770928872,"error":null,"frequency_penalty":0.0,"incomplete_details":null,"instructions":"...personality.\n...","max_output_tokens":null,"max_tool_calls":null,"model":"gpt-5.2-2025-12-11","

See also https://github.com/openai/codex/issues/11561