Jul 7, 2026 · 1 min read

The Hope Experiment

We're extending access to Claude Fable 5 on all paid plans through July 12.
— Claude (@claudeai) July 7, 2026

A black-and-white image shows a white mouse clinging to the side of a tall glass cylinder filled with water, with a small white bird icon in the top right corner. Beside it, a black background features the text "THE HOPE EXPERIMENT" in bold white letters.

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