As of 11 October 2026, a new US–Iran ceasefire has not been announced. On 6 October, the UN Secretary-General called for an end to the renewed conflict and pointed to its human and trade costs.
What is known.
An earlier ceasefire cannot settle this forecast. It requires a fresh, reciprocal agreement announced by both governments, or formally confirmed by the UN, after 11 October and before the end of 2026.
Why it is a possibility.
The earlier mediation shows that a negotiating channel can exist even during confrontation. Still, renewed fighting and the failure of the previous halt make a durable new public agreement difficult on this timetable, leaving the editorial estimate below an even chance.
What could prevent it.
A previous ceasefire broke down and the UN reported continued conflict in October.
How it will be assessed.
Resolves yes if both the US and Iranian governments publicly announce a new reciprocal ceasefire agreement dated after 11 October 2026, or the UN formally confirms such an agreement, by 31 December. The earlier June ceasefire does not count.
Sources and primary records
Probabilities are provisional editorial estimates, not guarantees. Sources document the present evidence and resolution rule. Read the full disclaimer.