Ukraine had two clusters open on 10 August: Fundamentals, opened 15 June, and External Relations (Cluster 6), opened at the 14 July accession conference, per the European Commission.
The clusters market resolves on the number of negotiating clusters formally opened with Ukraine per official Council of the EU press releases (consilium.europa.eu) as of 10 August 2026; announcements of intent do not count, only formal openings at an intergovernmental conference. consilium.europa.eu and ec.europa.eu official publications.
We looked at the last five countries whose EU membership talks passed an opening step, and asked what happened next. They split into two groups. Two kept opening new chapters of talks. Three opened talks and then stalled for years.