Amp 4.8 introduces a unified agent control interface across web, mobile, and CLI, letting you monitor and manage all active agents in one place without juggling terminal tabs. Opus 4.8 now powers smart mode with 62% task success (up from 52%), making more focused changes, verifying its work 15% more often, and reaching for tools like librarian and repo skills without prompting. Opus 4.8's fast mode runs 2.5× faster at 3× lower cost than the previous version. The model prefers surgical edits over full file rewrites and reads files directly from the shell instead of using a dedicated read tool.