Has a FIBA World Cup game ever ended 86-82?
Exactly once. On August 19, 2017, Sweden beat Slovakia 86-82, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 86-82 in league history.
That makes 86-82 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 87-82 has happened 5 times and 86-83 has happened 1 times.