Claude Fable 5 vs Claude Opus 4.8
2 posts33 likes7.7K views
Claude Fable 5 vs Claude Opus 4.8 in real side-by-side tests: 2 posts from X where both got the same prompt. Judge coding ability from the actual outputs.
Posts
2
Same prompt, separate runs
1Not a controlled comparison: prompts, tools and time differ.
Summary
Claude Fable 5 and Claude Opus 4.8 appear together in 2 posts on X: solar system from raw physics (@alex_verem) and 3D Rubik's cube from a two-line prompt (@AIStackEngineer). None of these posts report cost or time per model. According to @AIStackEngineer, Fable 5 made glossy rounded tiles with real lighting; Opus 4.8 made flat colored squares. (The author’s view.)
What each post reports
| Post | Model | Time | Cost | Tokens | Author’s verdict | Original |
|---|---|---|---|---|---|---|
| Solar system from raw physics@alex_verem | Claude Fable 5 | — | — | — | — | X post |
| Solar system from raw physics@alex_verem | Claude Opus 4.8 | — | — | — | — | X post |
| 3D Rubik's cube from a two-line prompt@AIStackEngineer | Claude Fable 5 | — | — | — | Author’s pick | X post |
| 3D Rubik's cube from a two-line prompt@AIStackEngineer | Claude Opus 4.8 | — | — | — | — | X post |
Only numbers stated in each post. “—” means the post doesn’t say.
Who won where
1- 3D Rubik's cube from a two-line promptFable 5 made glossy rounded tiles with real lighting; Opus 4.8 made flat colored squares.— the author’s view, @AIStackEngineer (paraphrased)
Prompts shown in the posts
build a 3D Rubik's cube — @AIStackEngineer
Models
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