Meta's Next Frontier Model, Codenamed 'Watermelon,' Reportedly Reaches GPT-5.5 Parity in Internal Tests

Meta's next frontier AI model, developed under the internal codename "Watermelon," has reached parity with OpenAI's GPT-5.5 on the company's own benchmarks, according to reports of internal remarks by the head of Meta Superintelligence Labs. The claim, disclosed in a company town hall rather than an official product launch, signals Meta's most concrete attempt yet to close the gap with rivals at the top of the AI race.