I gave 6 AI coding agents the same task
Build an autonomous 3D water simulation from scratch (TypeScript + Three.js, no physics engine). Same prompt, fresh empty repo each. ✅ Claude Opus 5 · Fable 5 · Sonnet 5 · Codex GPT-5.6-sol ❌ Haiku 4.5 · Grok 4.20 Results:
AI did not make websites faster.
It made choosing slower. textura shows the real bottleneck of opus 5 web builds. prompts library + claude = ten directions in minutes. picking one can take longer than the generate click. before: one design. iterate. ship. now: infinite mid.
Threejs with Opus 5!
Claude built the only game that made me care about the cats.
Same prompt. One shot. No fixes. Claude Opus 5 xhigh: ~28m · ~170K tokens · ~$4.60 Qwen 3.8 Max: ~35m · ~50K · ~$0.60 GPT-5.6 Sol: ~19m · ~22.5K · ~$0.68 Grok 4.6 xhigh: 23:48 · 113K · $0.68 All four built playable
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