Codex in GPT-5.5 Mode Keeps Calling Itself GPT-5 with Old Cutoff
CtrlAltDwayne · x · 2026-07-08
Users discovered that when OpenAI Codex is set to GPT-5.5 xhigh mode, it consistently identifies as GPT-5 in all new conversations and reports a knowledge cutoff of June 2024, contradicting its actual configuration. This reveals a discrepancy between the model's self-identification and its actual version settings, serving as a notable heads-up for developers using Codex.
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