Elon Musk’s artificial intelligence company, xAI, has introduced Grok 4.5 in private beta, claiming the new model delivers stronger performance than rival AI systems, including Anthropic’s Claude Opus, across several benchmarks. According to xAI, Grok 4.5 is currently available only to a select group of testers, and the private beta will help evaluate the model’s performance before a wider rollout. Musk described the model as the company’s most advanced AI system so far, saying it offers improvements in reasoning, factual accuracy, and response quality, and claimed the latest version performs better than competing frontier models in several evaluation tests. However, xAI has not released detailed benchmark data or independent validation to support all of its performance claims. The launch adds to the fast-moving AI race, where companies like OpenAI, Anthropic, Google, and Meta keep releasing new models. Since developing Grok, xAI has been increasing the bot’s functionality on the X platform while making substantial investments in computational technology and large language models. The wider launch is expected after testing is complete and feedback from beta users is received; xAI has provided no official timeline.