Original: Dan Shipper (Every) · 09/12/2025
Summary
When Every CEO Dan Shipper started using Opus 4.5, his previous frustrations with AI coding—errors, hallucinations—disappeared. by Katie Parrottin Source CodKey Insights
“When Every CEO Dan Shipper started using Opus 4.5, his previous frustrations with AI coding—errors, hallucinations—disappeared.” — Discussing the significant improvements Opus 4.5 brings to AI coding.
“This is by far the most exciting model, maybe ever.” — Kieran Klaassen’s enthusiastic endorsement of Opus 4.5.
“We knew we needed to do more than write about what we were seeing. We needed to show it.” — The motivation behind hosting Claude Code Camp to demonstrate Opus 4.5’s capabilities.
Topics
Full Article
Published: 2025-12-09
Source: https://every.to/source-code/how-every-is-harnessing-the-world-changing-shift-of-opus-4-5
<table><tr><td><img alt=“Source Code” src=“https://d24ovhgu8s7341.cloudfront.net/uploads/publication/logo/99/small_Frame_9121.png” /></td><td></td><td><table><tr><td>by <a href=“https://every.to/@katie.parrott12”>Katie Parrott</a></td></tr><tr><td>in <a href=“https://every.to/source-code”>Source Code</a></td></tr></table></td></tr></table><figure><img src=“https://d24ovhgu8s7341.cloudfront.net/uploads/post/cover/3862/full_page_cover_Camp_guys_opus.png” /><figcaption>Midjourney/Every illustration.</figcaption></figure><p><em>Our last coding camp of the year is <u><a href=“https://0ab9ee3d.click.convertkit-mail2.com/lmulv69l7gimhnwokkkt6h8k52600bghd2pg2/z2hghnhewvk8m9ap/aHR0cHM6Ly9ldmVyeS50by9jb3Vyc2VzL2NvZGV4LWNhbXAvcHVyY2hhc2U=” rel=“noopener noreferrer” target=“_blank”>Codex Camp</a></u>—a live workshop about building with OpenAI’s coding agent, open to all Every subscribers on Friday, December 12 at 12 p.m. ET. <u><a href=“https://every.to/courses/codex-camp/purchase” rel=“noopener noreferrer” target=“_blank”>Learn more and reserve your spot</a></u>.—<u><a href=“https://every.to/on-every/kate-lee-joins-every-as-editor-in-chief” rel=“noopener noreferrer” target=“_blank”>Kate Lee</a></u></em></p><p><em>Was this newsletter forwarded to you? <u><a href=“https://every.to/account” rel=“noopener noreferrer” target=“_blank”>Sign up</a></u> to get it in your inbox.</em></p><p></p><hr class=“quill-line” /><p></p><p>Every’s take on Anthropic’s latest model, <u><a href=“https://every.to/vibe-check/vibe-check-opus-4-5-is-the-coding-model-we-ve-been-waiting-for” rel=“noopener noreferrer” target=“_blank”>Opus 4.5</a></u>, is that it’s a world-changing shift in AI-powered coding. </p><p>When Every CEO <strong><u><a href=“https://every.to/@danshipper” rel=“noopener noreferrer” target=“_blank”>Dan Shipper</a></u> </strong>started using <u><a href=“https://every.to/vibe-check/vibe-check-opus-4-5-is-the-coding-model-we-ve-been-waiting-for” rel=“noopener noreferrer” target=“_blank”>Opus 4.5</a></u>, his previous frustrations with AI coding—errors, hallucinations—disappeared. After the model was released in late November he built his dream reading app between meetings in one week, work that would have <u><a href=“https://every.to/chain-of-thought/opus-4-5-collapsed-six-months-of-development-work-into-one-week” rel=“noopener noreferrer” target=“_blank”>taken him six months before</a></u>.</p><p>Meanwhile, resident Claude Code wizard <strong><u><a href=“https://every.to/@kieran_1355” rel=“noopener noreferrer” target=“_blank”>Kieran Klaassen</a></u></strong> was so enamored with the model, he started 10 projects at once and kept sneaking away from Thanksgiving dinner to prompt more. “This is by far the most exciting model, maybe ever,” he said.</p><p>We knew we needed to do more than write about what we were seeing. We needed to show it. Cue our latest Claude Code Camp.</p><p>Over the course of the hour, Dan and Kieran walked more than 400 Every subscribers through what they’ve discovered working with Opus 4.5. They demoed real workflows, shared emerging patterns in how to think about code, and answered questions about everything from how to take advantage of the model’s new-and-improved computer use capabilities to what this means for the <u><a href=“https://every.to/source-code/my-ai-had-already-fixed-the-code-before-i-saw-it” rel=“noopener noreferrer” target=“_blank”>compound engineering</a></u> playbook. </p><p>Here’s what we learned—and what you can apply immediately. </p><p></p><hr class=“quill-line” /><p></p><p><strong>Become a <u><a href=“https://every.to/subscribe” rel=“noopener noreferrer” target=“_blank”>paid subscriber to Every</a></u> to unlock this piece and learn about:</strong></p><ol><li><span class=“ql-ui” contenteditable=“false”></span>The five things that have shifted about AI coding with Opus 4.5 </li><li><span class=“ql-ui” contenteditable=“false”></span>Why Dan calls Opus 4.5 “the infinite coding machine”—and what broke with every model before it</li><li><span class=“ql-ui” contenteditable=“false”></span>The bottleneck that occurs when your AI can handle 10 projects at once</li></ol><div class=“quill-button” id=“quill-button-1765294959699”><a href=“https://every.to/subscribe?source=post_button”>Subscribe</a></div><p><hr /></p><p><em><a href=“https://every.to/source-code/how-every-is-harnessing-the-world-changing-shift-of-opus-4-5”>Click here</a> to read the full post</em></p><p>Want the full text of all articles in RSS? <a href=“https://every.to/subscribe”>Become a subscriber</a>, or <a href=“https://every.to”>learn more</a>.
Key Takeaways
Notable Quotes
When Every CEO Dan Shipper started using Opus 4.5, his previous frustrations with AI coding—errors, hallucinations—disappeared.Context: Discussing the significant improvements Opus 4.5 brings to AI coding.
This is by far the most exciting model, maybe ever.Context: Kieran Klaassen’s enthusiastic endorsement of Opus 4.5.
We knew we needed to do more than write about what we were seeing. We needed to show it.Context: The motivation behind hosting Claude Code Camp to demonstrate Opus 4.5’s capabilities.
Related Topics
- [[topics/ai-agents]]
- [[topics/anthropic-api]]
- [[topics/prompt-engineering]]
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Originally published at https://every.to/source-code/how-every-is-harnessing-the-world-changing-shift-of-opus-4-5.