Matchup
Claude Fable 5.1 vs GPT-6 Astra
Also compared as: gpt-6 astra vs fable 5.1
3 posts141 likes13.5K views
Claude Fable 5.1 vs GPT-6 Astra in real side-by-side tests: 3 posts from X where both got the same prompt; 2 posts report 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 Fable 5.1 and GPT-6 Astra appear together in 3 posts on X: creative-studio landing page (@viktoroddy), Doom (1993) remake (@AbdoKerdawy) and simple GTA game: walk, drive, steal cars (@mxajeel). In @mxajeel's simple GTA game: walk, drive, steal cars, Claude Fable 5.1 used fewer tokens (4.6M tokens vs 7.2M tokens), as reported in the post. According to @mxajeel, the Astra build worked a lot better than the Fable one. (The author’s view.)
What each post reports
| Post | Model | Time | Cost | Tokens | Author’s verdict | Original |
|---|---|---|---|---|---|---|
| Creative-studio landing page@viktoroddy | Claude Fable 5.1 | — | — | — | — | X post |
| Creative-studio landing page@viktoroddy | GPT-6 Astra | — | — | — | — | X post |
| Doom (1993) remake@AbdoKerdawy | GPT-6 Astra | 15 min | — | — | — | X post |
| Doom (1993) remake@AbdoKerdawy | Claude Fable 5.1 | — | — | — | — | X post |
| Simple GTA game: walk, drive, steal cars@mxajeel | Claude Fable 5.1 | — | — | 4,580,000 | — | X post |
| Simple GTA game: walk, drive, steal cars@mxajeel | GPT-6 Astra | — | — | 7,230,000 | Author’s pick | X post |
Only numbers stated in each post. “—” means the post doesn’t say.
Who won where
1- Simple GTA game: walk, drive, steal carsThe Astra build worked a lot better than the Fable one.— the author’s view, @mxajeel (paraphrased)