Elon Musk Calls Claude Opus 5.5 a 'Masterpiece', Admits Grok 4.8 Won't Match It

xAI founder Elon Musk acknowledged that his upcoming Grok 4.8 AI model will not match the performance of Anthropic's Claude Opus 5.5, which he praised as a masterpiece. Musk stated that Grok 4.8 finished pretraining and could see a limited rollout this week following a software stack rewrite, while predicting that a subsequent Grok 5 model could surpass Opus in two to three months. Open article →