Source Intelligence

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 v2.1.36 Home All releases olderv2.1.34 v2.1.37newer
Claude Code v2.1.36

Enhanced Opus 4.6 Promotional Messaging

Promotional messages now include fast mode mentions for users who have extra usage enabled:

  • "Opus 4.6 is here · $50 free extra usage · Try fast mode or use it when you hit a limit /extra-usage to enable"
  • "Opus 4.6 is here · Try fast mode"
Evidence

Promotional strings (search for "Try 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 v2.1.36 →