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.
Model descriptions in the model picker now conditionally show pricing information based on the user's account type. First-party (subscription) users see cost indicators, while API users do not.
Evidence
Conditional pricing display (search for H4() !== "firstParty" in model selector functions near line ~147370)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.