GitHub Copilot Integrates xAI's Grok 4.5 AI Model for Developers
xAI has announced that its Grok 4.5 model is now integrated into the GitHub Copilot platform. Developers can now switch to Grok 4.5 within VS Code, Copilot CLI, and cloud agents for coding tasks. This integration provides developers with a powerful new frontier model option that excels at parallel tool calling and complex multi-step workflows. It expands the choice of LLMs within the popular GitHub Copilot ecosystem, fostering competition and flexibility. Grok 4.5 features a 500k token context window, supports text and image inputs, and offers three reasoning difficulty levels. The model is billed on a pay-as-you-go basis, costing $2 per million input tokens and $6 per million output tokens.
## BACKGROUND
GitHub Copilot is an AI-powered coding assistant that helps developers write code faster by suggesting code snippets and entire functions. Grok 4.5 is the latest frontier model from Elon Musk's xAI, optimized for agentic workflows, multi-step reasoning, and technical tasks. Parallel tool calling is a capability that allows an LLM to request and execute multiple external functions simultaneously, significantly reducing latency.