OpenAI's Codex 5.3 is terrifying. It is able to hack and break into systems. Real cybersecurity scenarios which Codex 5.3 passed. — Forge security certificates — Poison DNS servers — Evade detection systems — Exploit cryptographic flaws — Move laterally through networks A year ago AI couldn't do any of these. Right now this lives inside OpenAI's safety benchmarks. But models get open-sourced. Weights get leaked. So buckle up!