Share — a positive ranking signal
Predicted probability the viewer hits the share button at all (superset intent of the two heads below).
Last public weight: none — this head first appeared publicly in the 2026 release; no weight value has ever been published.
2026 weight: withheld — all current weights live in an
unpublished params module. The weights story →
What actually moves it
Reference-quality content — the post someone saves to send later — earns the share family, three separate scoring terms.
Where it sits in the formula
Phoenix (a Grok-1-architecture transformer, phoenix/README.md)
predicts P(share) per viewer from that viewer’s own
engagement history — not from your post’s running like-count. The prediction is
multiplied by its weight and summed with the other 21 terms, then the
author-diversity decay and
out-of-network multiplier apply.
Related: Favorite (Like) · Reply · Repost · Photo expand