Claude Opus 4.7 briefing card headed Active does not mean unchanged, showing fast mode removed, sampling parameters deprecated, an index score of 57 on v4.0 against 54 on v4.1, and tentative retirement no sooner than 16 April 2027.

Claude Opus 4.7 Is Still Active. What Changed, and When Should You Migrate?

Anthropic still lists Claude Opus 4.7 as Active, with retirement no earlier than 16 April 2027. Fast mode was removed on 24 July, requests that worked on Opus 4.6 now return errors, and Amazon Bedrock runs its own lifecycle clock. A document-first audit of what the label does not cover, and how to choose between staying, moving to 4.8, or moving to 5.

WUE is not an AI water meter: Google, Microsoft, AWS, and Meta cards show different data-center reporting boundaries.

AI Data Center Water: Why WUE Cannot Measure a Workload

AI data center water is reported through one metric, and three cloud operators publish it with three different numerators. Water Usage Effectiveness is a facility ratio, not an AI workload meter. This Tier C briefing reads the primary documents and sets out the eight fields to request before comparing any published water figure.

Summary graphic for the July 20, 2026 Claude Fable 5 plan change on paid Claude plans. A single horizontal bar labelled "one weekly pool" is divided at the midpoint: the left portion is marked as the Fable 5 ceiling and the right portion as everything else, with a bracket noting the pool is shared with Opus, Sonnet and Haiku. Text states that the ceiling sits inside the pool and is not added to it. Three points summarise the change: Fable 5 is included up to 50 percent of weekly limits, usage beyond that runs on usage credits at API rates, and zero data retention setups cannot use Fable 5. A stamp records that the previous promotion ended July 19 and the new terms took effect July 20, 2026.

Claude Fable 5 From July 20, 2026: What Happens on Each Paid Plan

The universal promotion ended July 19. From July 20, Claude Fable 5 stays inside Max plans and premium seats at up to 50 percent of weekly usage limits, a ceiling inside the existing pool rather than added capacity. Pro plans and standard seats keep the model on usage credits, with a one-time credit that must be claimed by August 2.