Dan Shipper is the CEO and cofounder of Every. Every week he explores the frontiers of AI in his column, Chain of Thought, and on his podcast, ‘AI & I.’
Opus 4.5 Collapsed Six Months of Development Work Into One Week
Welcome to agent-native apps, where features are written in English, not code
Dec 4, 2025 · 8 min readUpdated Jun 26, 2026
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:
- An edge where the known world falls off into nothingness, chaos, or monsters
- 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:
- We are in a new era of autonomous coding. You can build astonishingly complex apps without looking at a single line of code.
- 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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- How Dan built a complete iOS app without reading—or writing—a single line of code in a week
- Why the real breakthrough isn’t AI coding faster, but AI replacing code entirely
- The coming paradigm where features are written in English and users submit prompts instead of bug reports
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