Caught the massive OpenAI Codex model leak on video before it was patched! (GPT-5.5, Arcanine, Glacier-alpha)

Reddit r/singularity 04/22/26, 04:32 AM News

openai-leak codex internal-models gpt-5-5 arcanine glacier-alpha

Summary

A user recorded a brief leak in OpenAI Codex that exposed several unreleased internal models including GPT-5.5, Arcanine, and Glacier-alpha before the interface was patched.

Hey everyone, I opened up Codex today and was greeted by this massive list of unreleased and internal models. I managed to get a screen recording of the dropdown right before OpenAI seemingly realized the mistake and patched it out. It looks like they accidentally pushed their internal staging/dogfooding environment to production. Check out some of the tooltips from the video: * **GPT-5.5 & oai-2.1:** "Latest frontier agentic coding model" * **Arcanine:** "Frontier model with legendary appetite for starches" (someone at OpenAI is clearly a Pokémon fan 🥔) * **glacier-alpha:** "Intelligence that moves continents" * **glacier-alpha-block-cy3:** "Ice-cold intelligence" * **Heisenberg:** "Latest frontier life science research model" The video is attached. Did anyone else manage to catch this while it was live? What do you guys think the `cy` blocks or `glacier` models actually are? [Codex leak](https://reddit.com/link/1ssb7mz/video/71hqh5et6owg1/player)

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