302 | ChatGPT 1B user milestone but slips below 50% market share, GLM 5.2 takes the lead in coding, Microsoft CoPilot Cowork now available, and more AI news for the week ending on June 19 2026

Can a company reach 1 billion users before figuring out how to make money—and still dominate the future of AI? This week’s AI news cycle delivered a fascinating mix of milestones, competitive shakeups, enterprise AI breakthroughs, security concerns, and agentic innovation. OpenAI crossed the historic 1-billion-user mark, Microsoft opened Copilot CoWork to the masses, SpaceX made a massive move with its $60 billion Cursor acquisition, and new open-source challengers emerged to challenge the in...