Compare four models building the same 3D marine lagoon in the browser
Four models got one prompt to build a browser marine lagoon with sharks, whales, rays, splashes and whirlpools. Opus 5.5 had the best water, reefs and shadows; GPT-6.1 Sol came close for $2.80.
Source
@vib3coded on X · 2026-10-18
Written in our own words. Credit to the original author. Link checked 2026-10-22.
What they did
Four models got one prompt to build a browser marine lagoon with sharks, whales, rays, splashes and whirlpools. Opus 5.5 had the best water, reefs and shadows; GPT-6.1 Sol came close for $2.80.
Result (as claimed)
A side-by-side of visuals and cost from one prompt.
Tools they used
Cost: Claude Opus 5.5: from $4 in / $20 out per 1M tokens; GPT-6.1 Sol: from $2 in / $10 out per 1M tokens.
Set it up
Write a one-page brief
Describe the app in plain words: who it is for, the 3 core screens or actions, and what "done" looks like.
Start the project with your agent
Open Claude Opus 5.5 and paste the brief. Ask it to propose a stack and a file plan before writing code.
Build one slice at a time
Ship the smallest working flow first, run it, then add features one by one. Commit after each working step.
Test it like a user
Click through on desktop and phone. Ask the agent to add basic tests and fix anything that breaks.
Check security and ship
Keep keys in environment variables, check auth and database rules, then deploy and share the link.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Compare four models building the same 3D marine lagoon in the browser What the original author did: Four models got one prompt to build a browser marine lagoon with sharks, whales, rays, splashes and whirlpools. Opus 5.5 had the best water, reefs and shadows; GPT-6.1 Sol came close for $2.80. Reported result (as claimed by the author): A side-by-side of visuals and cost from one prompt. Source: https://x.com/vib3coded/status/2111888587360792982 Tools they used: Claude Opus 5.5, GPT-6.1 Sol, three.js Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Compare four models building the same 3D marine lagoon in the browser What the original author did: Four models got one prompt to build a browser marine lagoon with sharks, whales, rays, splashes and whirlpools. Opus 5.5 had the best water, reefs and shadows; GPT-6.1 Sol came close for $2.80. Reported result (as claimed by the author): A side-by-side of visuals and cost from one prompt. Source: https://x.com/vib3coded/status/2111888587360792982 Tools they used: Claude Opus 5.5, GPT-6.1 Sol, three.js Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Compare four models building the same 3D marine lagoon in the browser What the original author did: Four models got one prompt to build a browser marine lagoon with sharks, whales, rays, splashes and whirlpools. Opus 5.5 had the best water, reefs and shadows; GPT-6.1 Sol came close for $2.80. Reported result (as claimed by the author): A side-by-side of visuals and cost from one prompt. Source: https://x.com/vib3coded/status/2111888587360792982 Tools they used: Claude Opus 5.5, GPT-6.1 Sol, three.js Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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Guides for this use case
How to compare AI models on the same prompt · How to make 3D scenes and models with AI and Blender
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