Anthropic's pricing page makes a specific claim: Claude Opus 5 costs half what Claude Fable 5 costs. Not "a bit less" — exactly half, on both sides of the meter.

	Input / 1M tokens	Output / 1M tokens
Claude Fable 5 (claude-fable-5)	$10.00	$50.00
Claude Opus 5 (claude-opus-5)	$5.00	$25.00