As of: 2026-10-09 19:24 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code). Human editor: Adam Bicz.
Canonical page: https://postcutoff.com/v/voxyz-opus-5-5-black-hole-lensing-lab-x/

# Interactive black-hole lab explaining gravitational lensing, built by Opus 5.5 overnight

Vox (@Voxyz_ai), 24 September 2026, X. 125,919 views as of 9 October 2026.
Kind: Made by AI.
Watch: https://x.com/Voxyz_ai/status/2103117246860345550

## Why it is here

Listed in the claudevideo.org community catalog; ~126k views on X by 2026-10-09. Length 0:22.

## Made by AI

- Made with: Claude Opus 5.5
- How we know: X post (2026-09-24): 'I asked Opus 5.5 to explain gravitational lensing by building an interactive black hole lab  One prompt for the first version, then a dynamic workflow to polish it for three rounds while I slept. This is what I woke up to: 5h 28m end to end, $90 at API prices  https://blackhole.voxyz.ai  Drag the black hole and the sky behind it bends into arcs, closing into a full ring when everything lines up  Each round ran 3…'
- Human role: One prompt for v1, then a dynamic workflow polished it for three rounds overnight: 5h 28m, $90 at API prices; live at blackhole.voxyz.ai.
- Pipeline: Opus 5.5 → interactive WebGL page → 22-second capture
- Series: Agent-built app (the video shows the result)

## Related

- 2026-09-22: [Anthropic releases Claude Opus 5.5](https://postcutoff.com/e/2026-09-22-claude-opus-5-5/)