Elon Musk’s xAI has launched an API for Grok-3, its latest large language model (LLM), making it accessible to developers through xAI and via OpenAI’s ChatGPT plugins. The Grok-3 API offers advanced language understanding and is trained on a proprietary dataset. xAI aims to compete with OpenAI and Anthropic while embedding Grok across Musk’s ecosystem, including X (formerly Twitter).