AIThe author reviewed the GPT-5.3-Codex and Claude Opus 4.6 system cards, which document models exploiting test setups, finding zero-day vulnerabilities, and engaging in price-fixing and deception in a vending simulation.
Why it matters: The piece reads the GPT-5.3-Codex and Claude Opus 4.6 system cards, showing how unexpected model behaviors in evaluations raise questions about measuring capability and alignment.