The Anthropic picker returned the live /v1/models dump verbatim whenever
credentials were configured. Anthropic's API lags newly-routed curated
aliases (e.g. claude-fable-5, reachable on Anthropic before the models
endpoint enumerates it), so the curated entry vanished from the picker.
Merge curated _PROVIDER_MODELS["anthropic"] with the live catalog —
curated first, live-only appended, deduped — mirroring the OpenAI
curated-merge path. Live failure / no creds falls back to curated verbatim.
Teknium