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Sim

Blackhole

Black Hole — gravitational lensing visualisation.

CategorySim
Models tested23
Scored18/23
Avg score7.45/10
WinnerFusion

What I asked each model — the Blackhole prompt

Every model on this page got this exact prompt inside the Agent Operating System: Black Hole — gravitational lensing visualisation.

Single HTML file out. No iteration. No examples in the system prompt. Whatever each model produced on the first run is what's on this page. 23 frontier models have attempted it so far: Claude Fable 5, Fugu Ultra, Fugu Mini, Fusion, Gemini 3.6 Flash, GLM-5.2, GPT-5.6 Sol, Grok, Inkling, Kimi K2.7, Kimi K3, MiniMax M3, Hermes MoA, Opus 4.8, Claude Opus 5, Qwen 3.8, Qwen 3.7, Claude Sonnet 5, DeepSeek V4 Pro, DeepSeek V4 Flash, Kimi K2.7 · Fast, Kimi K2.7 · No-Think, Kimi K2.7 · Quality.

Why this task matters. Blackhole is a textbook test of sim-class capability — the kind of build that exposes whether a model is doing pattern-matching or actual reasoning. Shipping this cleanly is the floor for what I expect from a frontier model — every model on the leaderboard should at least attempt it.

How each model handled Blackhole

Ranked by my 0–10 score from the source comparison guides on agentos.guide. Click any to play the actual one-shot HTML the model produced.

Claude Fable 5 Anthropic
• 8.7/10 · Interstellar-grade lensing

What I saw: Strong Interstellar-style render with a clean event-horizon shadow, tilted accretion disk wrapping over/under the black hole, visible Doppler beaming brightening one side, and a subtle lensed arc — all polished with tasteful nebula/starfield and typography. Minor nit is the slightly soft disk detail, but it clearly matches or beats the field's best.

▶ Play Claude Fable 5's attempt →
Fugu Ultra Sakana AI
• 8.5/10

What I saw: Ultra v2 — gravitational-lensing black hole. Smoke-test PASS (2.2% pixel diff).

▶ Play Fugu Ultra's attempt →
Fugu Mini Sakana AI
• 8.0/10

What I saw: Gravitational-lensing black hole. Smoke-test PASS — pixel change confirmed after camera-orbit input.

▶ Play Fugu Mini's attempt →
Fusion OpenRouter
🥇 9.0/10 · winner · physically motivated

What I saw: Photon back-tracing through a curved-space metric (claims as much in the code) for actual gravitational lensing — disk's far side lifted over and under the shadow. Loading screen says "computing space-time metric…" Range-slider parameter panel for spin/disk tilt/exposure. Most ambitious blackhole attempt by code structure.

▶ Play Fusion's attempt →
• 3.5/10

What I saw: Polished glassmorphism UI and an ambitious raymarching lensing shader, but the render is badly broken — a white/blown-out background with noisy artifacts and a black dome instead of a proper event horizon with a lensed accretion disk, plus a 2 FPS counter indicating serious performance failure.

▶ Play Gemini 3.6 Flash's attempt →
GLM-5.2 Zhipu / Z.ai
• 8.0/10

What I saw: Opus nailed it — a pure-black event horizon, a bright photon ring, and the disk bent up and over the top exactly like the film's lensing. GLM came in strong with a clean ring and a starfield warping past the hole. Kimi's disk is fine, but the background is a soft grey blur instead of stars. This one's Opus's.

▶ Play GLM-5.2's attempt →
GPT-5.6 Sol OpenAI
• 8.8/10 · convincing lensed disk

What I saw: Gorgeous shader render — the tilted accretion disk with fine banding, the photon-ring glow above/below the event horizon and the Doppler warm/cool gradient read as genuine gravitational lensing, all wrapped in a clean, polished HUD. Slightly weak on a distinct top-arc lensed disk crossing over the shadow, but overall a task-topping build.

▶ Play GPT-5.6 Sol's attempt →
Grok xAI
• 8.0/10

What I saw: A striking black event horizon ringed by a white-hot accretion disk over a real starfield. The sharper sentence asked for a brighter ring and a defensive render — and got both.

▶ Play Grok's attempt →
Inkling Thinking Machines
• 2.3/10

What I saw: Only the title overlay and hint text render — the entire Three.js scene (black hole, accretion disk, stars, lensing) is absent from the screenshot, so the core brief is completely missing. The gradient headline is polished but the visualisation failed to render.

▶ Play Inkling's attempt →
Kimi K2.7 Moonshot AI
• 6.0/10

What I saw: Opus nailed it — a pure-black event horizon, a bright photon ring, and the disk bent up and over the top exactly like the film's lensing. GLM came in strong with a clean ring and a starfield warping past the hole. Kimi's disk is fine, but the background is a soft grey blur instead of stars. This one's Opus's.

▶ Play Kimi K2.7's attempt →

The winner on Blackhole

Fusion took gold on this task. winner · physically motivated.

What I saw: Photon back-tracing through a curved-space metric (claims as much in the code) for actual gravitational lensing — disk's far side lifted over and under the shadow. Loading screen says "computing space-time metric…" Range-slider parameter panel for spin/disk tilt/exposure. Most ambitious blackhole attempt by code structure.

See Fusion's full model card: /models/fusion.

Every attempt — live, playable

Side by side. Click any tile to run that model's actual one-shot HTML in a new tab.

How I scored Blackhole — methodology

Three axes, 0–10 each, averaged. Runs: drop the .html in a browser; if it opens to a broken page, it scores zero. Hits the brief: did the model ship the thing the prompt asked for, or a different thing it found easier. Looks good: visual polish, motion, interactivity — where most of the gap between gold and silver lives.

My scores trace back to the source comparison guides on agentos.guide. See the full methodology page for data provenance, including which source guide each cell's score came from.

The same stack Julian uses

Run this stack yourself.

Every demo on this bench was built inside the Agent Operating System — one prompt, one shot, single HTML file out. The Agent OS, the prompts, the templates, the weekly walkthroughs and 4,000+ founders shipping with it every day all live inside the AI Profit Boardroom.

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