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Vibe Check: Claude Opus 5 Is Brilliant in Flashes, Frustrating in Practice

Anthropic’s latest Opus can do impressive work—but getting it there may require dismantling the systems you already use

July 24, 2026

Claude Opus 5 is a hard model to love. In its first week at Every, it argued with instructions, stopped before the work was finished, and generally didn’t play well with our existing skills and plugins like compound engineering. Our first reaction was: What have they done to my boy?

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Dan Shipper is the co-founder and CEO of Every. You can read more of his work in Chain of Thought.

Katie Parrott is a staff writer at Every. You can read more of her work in her newsletter.

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