Episode Details

Claude Mythos & GPT-5.5 Leaks: Unreleased Frontier Models Exposed in the Same WeekThe script covers two major AI leaks happening in the same week: Anthropic’s unreleased Claude Mythos (also referenced as MFO), described as so powerful at finding software bugs and zero-day vulnerabilities that Anthropic said it was too dangerous to release publicly, and OpenAI’s apparent GPT-5.5 leak via a Codex UI model picker. It recounts how a CMS misconfiguration previously exposed documents about Mythos, then describes a Bloomberg-reported incident where a private Discord group allegedly gained access by guessing model endpoint names and using third-party contractor credentials, prompting Anthropic to investigate. Separately, Codex users reportedly saw at least eight internal OpenAI model names (including GPT 5.5, OAI 2.1, Arcanine, Glassier Alpha variants, Heisenberg, and GPT Rosalyn), with some developers briefly testing GPT-5.5 and describing it as faster and more token efficient.00:00 Two Major Model Leaks00:27 Claude Mythos Exposed00:51 Why Mythos Is Dangerous02:00 Discord Access Breach03:23 What It Means For You04:20 OpenAI Codex Model List05:39 GPT 5.5 First Impressions07:24 Mystery Models Explained08:04 Industry Moving Too Fast09:13 Predictions And Wrap Up09:39 Community And Final Thanks