
Claude Code Fast Mode On Opus 4.7, The 4x Output Speed That Did Not Cost Quality
Anthropic shipped Fast Mode for Claude Code on Opus 4.7. The press read said faster output. The operator read is sharper: same Opus, same 1M context, output speed roughly 4x. Twenty-one days of pair-programming against a real backlog, here is the operator playbook for when to flip /fast and when to leave it off.



