The xAI Grok API provides access to powerful frontier models, including the Grok 4 series, supporting chat completions (text + vision), image generation, tool calling (function calling and built-in tools like web search), and more advanced features. Quick Intro Sign up at https://x.ai/api. Generate an API key from the console. Install pip install xai-sdk. Set env var: export XAI_API_KEY="your_key_here". Models list: https://docs.x.ai/developers/models. I'll share some samples in Python.