Claude Opus 5.5 vs GPT-6 Astra

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Claude Opus 5.5 vs GPT-6 Astra in real side-by-side tests: 4 posts from X where both got the same prompt; 1 post reports cost or time. Judge coding ability from the actual outputs.

Posts

4

Summary

Claude Opus 5.5 and GPT-6 Astra appear together in 4 posts on X: jelly Rubik's cube (@0xRhinoX), night train 3D scene (@EnvolDev), interactive holographic CD (@kinderlayer) and Mario Kart-style racing game (@LuminaBench). All are part of larger lineups with other models. In @0xRhinoX's jelly Rubik's cube, GPT-6 Astra was cheaper ($4.27 vs $11.10) and faster (1 h 14 min vs 1 h 23 min), as reported in the post. According to @0xRhinoX, only Claude Sonnet 5.5 and Claude Opus 5.5 produced translucent jelly. (The author’s view.)

What each post reports

Claude Opus 5.5 vs GPT-6 Astra: cost, time and tokens as stated in each post
PostModelTimeCostTokensAuthor’s verdictOriginal
Jelly Rubik's cube@0xRhinoXGPT-6 Astra1 h 14 min$4.27——X post
Jelly Rubik's cube@0xRhinoXClaude Opus 5.51 h 23 min$11.10—Only Claude Sonnet 5.5 and Claude Opus 5.5 produced translucent jellyX post
Night train 3D scene@EnvolDevGPT-6 Astra————X post
Night train 3D scene@EnvolDevClaude Opus 5.5————X post
Interactive holographic CD@kinderlayerGPT-6 Astra————X post
Interactive holographic CD@kinderlayerClaude Opus 5.5————X post
Mario Kart-style racing game@LuminaBenchClaude Opus 5.5————X post
Mario Kart-style racing game@LuminaBenchGPT-6 Astra————X post

Only numbers stated in each post. “—” means the post doesn’t say.

Who won where

1
  • Jelly Rubik's cubeOnly Claude Sonnet 5.5 and Claude Opus 5.5 produced translucent jelly.— the author’s view, @0xRhinoX (paraphrased)

Prompts shown in the posts

Build a night train. — @EnvolDev

Models

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