OpenAI's Codex Surpasses 5 Million Weekly Users; Musk Reverses Stance on Anthropic

OpenAI's AI coding agent, Codex, now integrated into ChatGPT Work, has exceeded 5 million weekly users, with over 1 million utilizing it for non-programming tasks like finance reporting. Meanwhile, Elon Musk has publicly reversed his previous skepticism about Anthropic, now calling it an AI leader and noting Anthropic is one of SpaceX's largest customers as of July 2026.

Context

OpenAI's Codex is an AI-powered coding assistant that has gained traction for its ability to assist users in various tasks. The integration of Codex into ChatGPT Work has broadened its appeal, attracting users from different fields. Elon Musk's previous skepticism about AI safety and capabilities contrasts sharply with his recent support for Anthropic, a competitor in the AI space.

Why it matters

OpenAI's Codex reaching over 5 million weekly users signifies a growing reliance on AI tools in various sectors, including those beyond programming. This trend highlights the increasing integration of AI into everyday tasks, potentially transforming workflows across industries. Musk's endorsement of Anthropic reflects a shift in attitudes towards AI companies, which could influence investment and collaboration in the tech sector.

Implications

The rise of Codex could lead to increased competition among AI tools, prompting other companies to innovate or improve their offerings. Industries that adopt AI tools may experience enhanced efficiency and productivity. Musk's support for Anthropic may bolster its reputation and financial standing, potentially affecting its market position and partnerships.

What to watch

Monitor user growth trends for OpenAI's Codex to understand its impact on the market. Watch for potential partnerships or projects that may emerge from Musk's newfound support for Anthropic. Upcoming announcements from both OpenAI and Anthropic could indicate shifts in their strategic directions or new product offerings.