Grok 4.5 Integrated Directly into Codex Coding Tool via X Premium Sign-In
Users can now access the Grok 4.5 large language model directly within the Codex coding tool. This integration allows users to authenticate and use the model simply by signing in with their existing X Premium accounts. This integration provides developers with a seamless way to leverage Grok 4.5's advanced capabilities in their coding workflows without needing separate API keys. It also adds significant value to the X Premium subscription by expanding its utility into developer tools. Grok 4.5 features a 500k-token context window and supports multimodal input, reasoning, and code execution. The integration simplifies access for developers who already subscribe to X's premium tier, bypassing traditional API setup.
## BACKGROUND
Codex is an AI-powered coding agent and tool designed to assist developers with tasks like writing, debugging, and refactoring code. Grok 4.5 is a frontier large language model developed by xAI, optimized for coding, agentic tasks, and complex reasoning.