What
When Sonnet 5 is on a launch promotion, the model picker displays the promo price with the regular list price struck through next to it.
Details
- During the promo period, the Sonnet 5 entry shows:
~~$3/$15~~ $2/$10 per Mtok · promo through [date] - The promo expiry date is read from the
cedar_basinkey in the remote server config (AI()?.cedar_basin).Dlo()parses the value and returns it only ifDate.now() < parsedMs(live gate); once the date has passedDlo()returnsundefinedand no promo UI is rendered Rlo()formats the raw date string usingtoLocaleDateString("en-US", { month: "short", day: "numeric", timeZone: "UTC" }), producing e.g."Jun 29"- The
descriptionfield carries the promo price ($2/$10 per Mtok · promo through …) so plain-text consumers read it unambiguously; rich pickers (the CLI model-selector component) additionally prependchalk.dim.strikethrough(promoListPrice)before the first$X/$Ytoken indescription, producing the struck-through display - When no promo is active the description falls back to
C1(jte)— the standard pricing description string - The "Sonnet 5 (1M context)" entry (
Nlo()) follows the same pattern; when running in a standalone/operator context (Ao()returnstrue) all pricing is omitted and only"Sonnet 5 for long sessions"is shown - Third-party provider users (Bedrock, Vertex, etc.) do not see promo pricing:
gBn()applies the promo display block only whenud()returnsfalse(first-party API key users) - This is a new UI field:
promoListPriceadded to the model row schema specifically to support struck-through rendering in rich pickers;descriptionalways carries only the promo price so plain-text consumers are unaffected
Evidence
Promo gate function Dlo() reading AI()?.cedar_basin; formatter Rlo() (search for "$2/$10 per Mtok" and "promoListPrice"); rich-picker rendering (search for "dim.strikethrough"); schema documentation (search for "@internal List price (e.g. \$3/$15\)")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.