A clandestine model known by the codename "Lobster" has surfaced on WebDev Arena, surpassing Grok-4 in performance, fueling rampant speculation among internet users that it might indeed be GPT-5. Early adopters report that this model excels in programming tasks, demonstrating proficiency even in managing intricate legacy codebases. Despite the absence of an official announcement, numerous clues point towards this being the low-key launch of GPT-5.