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 v2.1.129 Home All releases olderv2.1.128 v2.1.131newer

Fast Mode Model Text is Now Dynamic

Fast Mode descriptions no longer hardcode Opus 4.6 in all paths. The displayed Fast Mode model can now be generated dynamically.

Evidence

Dynamic Fast Mode copy (search for "Fast mode for Claude Code uses Claude" and "CLAUDE_CODE_ENABLE_OPUS_4_7_FAST_MODE")

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

See this entry in the whole of v2.1.129 →