Every's Test of Fable 5.2: Shipped a Video Editor in Three Days, Works Unattended Overnight
every · x · 2026-11-13
Every writes that Anthropic's new Fable 5.2 is a paradigm shift. Kieran Klaassen set it to work on a day off building a video editor; three days later Everycut was live—an app combining Premiere-style editing, After Effects-style effects, and Ableton-style mixing, all driven by an AI agent. Unlike Opus 5.5, which keeps you in the loop, Fable 5.2 can take the whole product: building, testing, and refining until it produces production-grade tools professionals can use without ever reading the code.
In another case, it distilled a teammate's product philosophy from 1,000 sources (including 143 call transcripts) into settled rules, evolving ideas, and open disagreements—preserving uncertainty alongside decisions.
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