Claude Opus fast mode in GitHub Copilot

GitHub is rolling out Claude Opus 4.8 fast mode in Copilot preview for latency-sensitive coding and agentic sessions, with Business and Enterprise model policy off by default. Why it matters: Fast coding-agent modes can improve interaction speed, but this one uses usage-based billing at provider list pricing, so teams need explicit routing and cost controls before making it a default.

Try this: Run one latency-sensitive coding task in fast mode and compare response speed, edit quality, and billed usage against the standard model before expanding access.