/fast[on|off]

Toggles fast mode (same model, faster output). It can be toggled mid-response; the running turn finishes at its original speed. See the official fast mode docs for pricing.

Best use

Under time pressure: /fast on; otherwise /fast off.

Related commands · Model & reasoning

• /modelSwitch models
• /advisorEnables or disables the advisor tool, which consults a second model at key moments.
• /effortSets the effort level: low to xhigh, max, or auto; status prints it.
• /output-styleLists output styles or switches to one, e.g.