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Sweep 28 Aug 2026 ยท 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

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.

One change

system-prompts

release-notes/system-prompts

first seen The page's own history The capture it came from

Nearest release: v2.1.242, published an hour before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

release-notes/system-prompts Page removed · 2548 lines, page removed

## Claude Opus 5 ## Claude Fable 5 ## Claude Opus 4.8 ## Claude Opus 4.7 ## Claude Sonnet 4.6 ## Claude Opus 4.6 ## Claude Opus 4.5 ## Claude Haiku 4.5 ## Claude Sonnet 4.5 ## Claude Opus 4.1 ## Claude Opus 4 ## Claude Sonnet 4 ## Claude Sonnet 3.7 ## Claude Sonnet 3.5 ## Claude Haiku 3.5 ## Claude Opus 3 ## Claude Haiku 3

This page is larger than the 256 KiB this site keeps, so one side of the diff below stops where the stored text does.

The page is gone upstream. What it last said is kept here.