Claude Sonnet 5.5 vs GPT-6 Astra
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Claude Sonnet 5.5 vs GPT-6 Astra in real side-by-side tests: 3 posts from X where both got the same prompt; 1 post reports cost or time. Judge coding ability from the actual outputs.
Posts
3
Same prompt, separate runs
1Not a controlled comparison: prompts, tools and time differ.
Summary
Claude Sonnet 5.5 and GPT-6 Astra appear together in 3 posts on X: jelly Rubik's cube (@0xRhinoX), night train 3D scene (@EnvolDev) 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 $7.36) and Claude Sonnet 5.5 was faster (1 h 03 min vs 1 h 14 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.) According to @LuminaBench, Claude Sonnet 5.5 looks the best of the four. (The author’s view.)
What each post reports
| Post | Model | Time | Cost | Tokens | Author’s verdict | Original |
|---|---|---|---|---|---|---|
| Jelly Rubik's cube@0xRhinoX | GPT-6 Astra | 1 h 14 min | $4.27 | — | — | X post |
| Jelly Rubik's cube@0xRhinoX | Claude Sonnet 5.5 | 1 h 03 min | $7.36 | — | Only Claude Sonnet 5.5 and Claude Opus 5.5 produced translucent jelly | X post |
| Night train 3D scene@EnvolDev | Claude Sonnet 5.5 | — | — | — | — | X post |
| Night train 3D scene@EnvolDev | GPT-6 Astra | — | — | — | — | X post |
| Mario Kart-style racing game@LuminaBench | Claude Sonnet 5.5 | — | — | — | Author’s pick | X post |
| Mario Kart-style racing game@LuminaBench | GPT-6 Astra | — | — | — | — | X post |
Only numbers stated in each post. “—” means the post doesn’t say.
Who won where
2- Jelly Rubik's cubeOnly Claude Sonnet 5.5 and Claude Opus 5.5 produced translucent jelly.— the author’s view, @0xRhinoX (paraphrased)
- Mario Kart-style racing gameClaude Sonnet 5.5 looks the best of the four.— the author’s view, @LuminaBench (paraphrased)
Prompts shown in the posts
Build a night train. — @EnvolDev
Models
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