Fable 5.2 cost notes and tier scores

This item merges the official announcement and two review posts. @claudeai announced Fable 5.2 and Mythos 5.2. @DDJCXX retells official coding-test scores: Medium 37.6%, High 45.3%, Xhigh 49.1%, and Max 45.6%, but Max costs more than three times as much as Xhigh, so the top writing-code tier is not actually the strongest. The scores and the price comparison come from the author's retelling of official material, should be checked against the official notes, and have not been independently verified.

@wquguru says Opus 5.5 medium is the daily driver and Fable 5.2 is the advisor, at about twice the unit price of Opus; a routine Python bug costs about $1.87 on Fable medium and about $0.97 on Opus, with the gap at the high tier around 4.5×. Those costs are the author's claims and have not been verified. The usage is /advisor fable, and you can also switch with /effort and /advisor off.