Jaw literally dropped. I ran the prompt from the "Made entirely with Opus 5.5" post on my own project. Here's what Claude Code made on its own for about $4.

After [this post](https://www.reddit.com/r/ClaudeAI/comments/1wogab3/made_entirely_with_opus_55_321_of_openrouter_api/) I wanted to see if it holds up, so I copied the OP's prompt almost word for word into Claude Code, gave it an OpenRouter key with a $10 cap, and walked away. For the subject I used [Friendr.nl](http://Friendr.nl), my own small side project, because I needed a real product to explain. The point isn't the app, it's the test. What it did, unattended, in about 1.5–2 hours: * Wrote the script and concept. * Generated the collage art, the voice-over, the music and the sound effects. * Built the whole thing as a pure JavaScript canvas animation, then rendered it to MP4. * Synced every animation beat to the spoken words. * Used another model to review its own drafts, and fixed what came up. Cost: about $4 on OpenRouter. Afterwards I asked for an English version, which took about half an hour more. It's not Pixar, but it's 100% usable as a real explainer. All credit for…