Roi Cohen

A worthwhile head-page upgrade because it gives one of the quieter Jamba contributors a concrete place in the stack: the pre- and post-training work that turns a hybrid architecture into an actual usable model.

Useful because it captures one of the less-visible people behind AI21’s training stack, where hybrid-model quality depends as much on pre- and post-training choices as on the architectural headline.

A useful page because evaluation work is easy to flatten into leaderboard noise, and her profile anchors the people inside AI21 who were responsible for turning Jamba performance claims into something measurable.

A valuable systems page because hybrid-model launches depend on much more than modeling alone, and his contribution bucket points directly at the serving and infrastructure work needed to make Jamba usable in practice.

A better long-tail AI21 page because it makes the data side of Jamba visible, instead of leaving the impression that hybrid-model progress came only from architecture and not from the people shaping the data pipeline underneath it.

A useful page because it gives another one of the non-model contributors on Jamba-1.5 a real place in the map; frontier-model launches depend on product and execution work, not just research authorship.