1.5.13.
Jesus, the Christians and Christian tradition are actually mentioned by Josephus in the following texts:

1. Ant. 18, 4, 1: the Samaritan Messiah
2. Ant. 18, 3, 4: the temptation of Paulina
3. Ant. 19, 1, 13: Theatre performance in Rome in the presence of the Jewish King Agrippa I on 24 January 41, the day the Emperor Caligula was murdered
3.1. Crucifixion of a prince (hgemwn/hegemon),
3.2. Pantomime: The fable depicting the incest between Myrrha and her father Cinyras
4. Ant. 20, 5, 2: The governor Tiberius Alexander orders the crucifixion of James and Simon, the sons of Judas the Galilean.
5. Ant. 18, 2, 3: the newly founded city of Tiberias is settled.
Text No. 1 relates to Jesus’ execution; Nos. 2 and 3.2 are polemics against the Christian tradition of the virgin birth; No. 3.1 is an early performance of Jesus’ crucifixion as a play; No. 4 is an alternative report to Acts 12:1ff; No. 5 shows the historical context of the parable of the wedding banquet: Matt. 22:1-14; Luke 14:15-24.