"Made entirely with Opus 5.5": a full explainer video for $0, generated in 55 minutes from one prompt
criticasterdotcom · reddit · 2026-09-25
A developer shares an explainer video for his project generated end-to-end by Opus 5.5 (High) from a single prompt — about 55 minutes of autonomous work and $0 extra cost, because the repo accidentally lacked an OpenRouter API key so the model went fully local:
- Voice: Kokoro-82M TTS running locally on a Mac
- Music: composed in JavaScript, played via free FluidR3 soundfont instruments
- SFX: free Kenney CC0 packs plus code-synthesized effects
- QA transcription: local Whisper
The full prompt is included; key moves are demanding professional production value, granting access to any tools and the internet, instructing the model to work autonomously until done, and capping OpenRouter spend at $20 as a guardrail.
Related event: One Prompt Drives Opus 5.5 to Fully Autogenerate Hand-Drawn Animation(3 posts)→
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