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.
The model option list now de-duplicates entries by value before rendering. Duplicate rows are silently dropped with a warning log entry: "model options: dropping duplicate row [label] (value [value])". Disabled entries are sorted to the bottom of the list, after all enabled options.
Evidence
New deduplication pass (search for "model options: dropping duplicate row")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.