Claude Opus 5 Launches at Half the Price of Fable 5, and Anthropic's Efficiency Claims Have a Track Record Problem
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- 24 Jul 2026
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Discussion of the blog article Claude Opus 5 Launches at Half the Price of Fable 5, and Anthropic's Efficiency Claims Have a Track Record Problem.
Anthropic shipped Claude Opus 5 today: near-Fable 5 scores, a five-level effort dial, half the price. History says verify the token math before you trust it.
Discussion thread — share findings, corrections and follow-ups below.