Test which model writes better physics from scratch with a wrecking ball
A wrecking ball versus a 40-block tower, physics written from scratch, one shot each. GPT-6 Astra's blocks scattered and settled like real objects for $0.63; Opus 5.5 had prettier lighting but the ball just hung there.
Source
@ivanainai on X · 2026-10-16
Written in our own words. Credit to the original author. Link checked 2026-10-22.
What they did
A wrecking ball versus a 40-block tower, physics written from scratch, one shot each. GPT-6 Astra's blocks scattered and settled like real objects for $0.63; Opus 5.5 had prettier lighting but the ball just hung there.
Result (as claimed)
Astra won on physics and price.
Tools they used
Cost: GPT-6 Astra: from $10 in / $50 out per 1M tokens; Claude Opus 5.5: from $4 in / $20 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 GPT-6 Astra 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: Test which model writes better physics from scratch with a wrecking ball What the original author did: A wrecking ball versus a 40-block tower, physics written from scratch, one shot each. GPT-6 Astra's blocks scattered and settled like real objects for $0.63; Opus 5.5 had prettier lighting but the ball just hung there. Reported result (as claimed by the author): Astra won on physics and price. Source: https://x.com/ivanainai/status/2111109453206438101 Tools they used: GPT-6 Astra, Claude Opus 5.5 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: Test which model writes better physics from scratch with a wrecking ball What the original author did: A wrecking ball versus a 40-block tower, physics written from scratch, one shot each. GPT-6 Astra's blocks scattered and settled like real objects for $0.63; Opus 5.5 had prettier lighting but the ball just hung there. Reported result (as claimed by the author): Astra won on physics and price. Source: https://x.com/ivanainai/status/2111109453206438101 Tools they used: GPT-6 Astra, Claude Opus 5.5 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: Test which model writes better physics from scratch with a wrecking ball What the original author did: A wrecking ball versus a 40-block tower, physics written from scratch, one shot each. GPT-6 Astra's blocks scattered and settled like real objects for $0.63; Opus 5.5 had prettier lighting but the ball just hung there. Reported result (as claimed by the author): Astra won on physics and price. Source: https://x.com/ivanainai/status/2111109453206438101 Tools they used: GPT-6 Astra, Claude Opus 5.5 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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