feat(models): add Claude Haiku 5.5 and retire Sonnet 5 and Opus 5 to legacy (#16903)

Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
588d32e22bJulius Marminge committed on 10/7/2026, 6:30:29 PM· committed by GitHubparentf570bd2
1 file changedLine totals unavailable