CHATGPT 5.1 CODEX MAX

Summary from the TLDR AI newsletter

OpenAI's GPT-5.1-Codex-Max enhances capabilities over GPT-5.1-Codex, showing improved performance in SWE-bench-verified, SWE-Lancer-IC SWE, and Terminal-Bench 2.0. It advances task persistence, cybersecurity preparations, and introduces Windows training, while network access remains disabled by default for security. Despite substantial internal evaluation progress, external reviews show mixed cybersecurity capabilities, yet highlight advances in AI self-improvement tasks and overall code efficiency.