Opus 4.5 Collapsed Six Months of Development Work Into One Week

If you want to learn more about Opus 4.5, Kieran Klaassen and I are hosting a Claude Code Camp on Opus 4.5 exclusively for paid subscribers on Friday (that’s tomorrow) at 12 p.m. ET. Sign up and reserve your spot.—Dan Shipper

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Humans have always had two main intuitions about what we’ll find when we travel to the end of the earth:

1. An edge where the known world falls off into nothingness, chaos, or monsters
2. A new vista where unexplored, lush, and perhaps perilous territory extends toward a new horizon

The first is terrifying, a place to be avoided. The second represents possibility and an entirely new world.

These days most new AI model releases are incremental. Sometimes, though, a new model brings us right up to the edge of the known and allows us to take a peek at what lies beyond. Is it nothingness, dragons, or a new horizon?

Anthropic’s Opus 4.5 is one of those models, and I’ve been peering over the edge for about a week now. Here’s what’s over the horizon:

1. We are in a new era of autonomous coding. You can build astonishingly complex apps without looking at a single line of code.
2. Prompt-native apps are now possible. You can use Opus 4.5 as a general-purpose agent to power your app’s features. This turns new features into an exercise in prompt-writing, rather than coding.

The infinite vibe coding machine

The first step change with Opus 4.5 is...

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1. How Dan built a complete iOS app without reading—or writing—a single line of code in a week
2. Why the real breakthrough isn’t AI coding faster, but AI replacing code entirely
3. The coming paradigm where features are written in English and users submit prompts instead of bug reports