Source Intelligence
Follow Discord

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

← All of v2.1.39 Home All releases ←olderv2.1.38 v2.1.40newer→
Claude Code v2.1.39

Fast Mode Keyboard Toggle

What

Toggle fast mode directly from the chat interface using a keyboard shortcut.

Usage
  • Press Alt+O (or Option+O on macOS) to toggle fast mode on/off
  • A visual indicator shows the current fast mode state in the status bar
Details
  • Works only when fast mode is available for your account
  • Displays "Model set to [model] ยท Fast mode OFF" when switching models turns off fast mode
  • Keybinding identifier: chat:fastMode
Evidence

New keybinding and UI element (search for "chat:fastMode", "to toggle fast mode")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.39 →