Grok 4.5
xAI
$2 per million input tokens
Grok 4.5 is xAI’s smartest model for software development, agentic workflows, technical problem solving, and business productivity. It is built to handle demanding coding tasks, engineering challenges, multi-step reasoning, and knowledge work that requires accuracy, speed, and strong execution. The model was trained on high-signal datasets spanning coding, science, engineering, and mathematics, with reinforcement learning designed around long-running technical and agentic tasks. Grok 4.5 can generate full applications from a single prompt, work through complex Rust, C, C++, and software engineering problems, and assist with real-world development projects. It is also designed for office productivity, including building Excel models, creating PowerPoint diagrams and slide content, and writing clear documents in Word. The model emphasizes efficient reasoning, producing strong results while using fewer output tokens than some comparable leading models. Grok 4.5 is served at fast-model speeds and is priced for scalable API usage, making it practical for production development and automation. Users can access it through Grok Build, Cursor, and the xAI API console, with API integration available through standard developer workflows. Grok 4.5 is especially useful for teams that need a model capable of coding, planning, analyzing, building, and completing complex digital tasks from natural language instructions.