ANTHROPIC_EFFORTS_NO_XHIGH: tuple[EffortLabel, ...] = (
'low',
'medium',
'high',
'max'
)Anthropic effort labels for Opus 4.6 and Sonnet 4.6.
These models predate xhigh; Sonnet 4.5 rejects effort entirely.
See https://platform.claude.com/docs/en/build-with-claude/effort.