Your Daily Developer Tools Briefing

GitHub Copilot Shifts to Token-Based Billing, Microsoft Readies AI-Centric Build 2026

• GitHub Copilot officially transitioned to token-based AI Credits billing on June 1, replacing its previous flat-rate premium request model. While base plan prices remain unchanged, heavy users of agentic workflows are reportedly seeing their costs increase by 10x to 50x, leading some to cancel their subscriptions. This change also marks the retirement of annual plans, requiring existing annual subscribers to migrate to monthly usage-based plans or a free tier upon expiration.

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• Microsoft's Build 2026 conference, commencing June 2, is poised to introduce a new developer-optimized Windows 11 experience and underscore the capability to run AI models locally on PCs. Key announcements are anticipated around the Windows AI Runtime and WSL 3 with NPU passthrough, positioning Windows as a robust deployment platform for AI agents and addressing recent concerns about GitHub.

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• Anthropic's Project Glasswing, leveraging its Claude Mythos Preview model, has identified over 10,000 high- or critical-severity vulnerabilities in critical software, but this success has exposed a new bottleneck: patching capacity. Surprisingly, some open-source maintainers are requesting Anthropic to slow down its disclosure rate, as the average fix takes two weeks, indicating that remediation efforts cannot keep pace with AI-driven discovery. IBM has joined the Glasswing consortium to assist in addressing this challenge.

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