GitHub Retiring Opus 4.6 Fast from Copilot Pro+ and Pausing New Pro Trials

GitHub·medium signal

GitHub announced two significant Copilot changes on April 10: retiring Opus 4.6 Fast mode from Copilot Pro+ citing 'high concurrency and intense usage patterns' straining shared infrastructure, and pausing all new Copilot Pro trials. Users report Claude Opus 4.6 and Sonnet are no longer available in Copilot Pro (non-Plus) tiers. GitHub recommends standard Opus 4.6 as an alternative. The moves suggest GitHub is struggling with the economics of premium model access at scale — a signal that all-you-can-eat AI coding plans may not survive 2026.