---
format: "aidr-story-markdown/v1"
id: "f26ff85b63dc63a06c6eb290daed8af79045a0fb21614f48148a67f7180db002"
canonical_url: "https://aidr.today/f26ff85b?lang=en"
title: "How I Built an iPhone App in Four Days with Opus 5.5"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-09-29T18:57:26.000Z"
category: "Models"
topics: ["anthropic","llm"]
source_urls: ["https://projectautonomy.substack.com/p/i-built-an-iphone-app-in-four-days","https://lobste.rs/s/ggolae/how_i_built_iphone_app_four_days_with_opus_5","https://techcrunch.com/2026/10/01/opus-5-5-loves-to-tell-you-this-matters-and-other-ai-writing-tells/"]
summary: "How I planned, built, and refined a mobile app with Claude Opus 5.5"
---

# How I Built an iPhone App in Four Days with Opus 5\.5

> [Open the canonical story](<https://aidr.today/f26ff85b?lang=en>)

**Published:** 2026-09-29T18:57:26.000Z
**Category:** Models
**Topics:** anthropic, llm

## Summary

How I planned, built, and refined a mobile app with Claude Opus 5\.5

## Sources

- [Story source](<https://projectautonomy.substack.com/p/i-built-an-iphone-app-in-four-days>)
- [Discussion](<https://lobste.rs/s/ggolae/how_i_built_iphone_app_four_days_with_opus_5>)
- [Story source](<https://techcrunch.com/2026/10/01/opus-5-5-loves-to-tell-you-this-matters-and-other-ai-writing-tells/>)