GPT-6 Astra (Fully Tested & Side by Side comparison with Fable 5.1): ONE is a CLEAR WINNER!

In this video, I’ll be testing GPT-6 Astra against Fable 5.1 across KingBench 3 and four larger Long Horizon coding projects. Although Astra scored an impressive 90 percent, its higher token cost, inconsistent design choices, and failures on complex projects made Fable 5.1 my preferred model overall.

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Key Takeaways:

🚀 GPT-6 Astra scored 72 out of 80, or 90 percent, on the KingBench 3 benchmark.
🏆 Fable 5.1 ranked first with 92.5 percent, while Astra finished third on the leaderboard.
⌚ Astra performed especially well on the folding table, panda SVG, and 3D wristwatch tests.
🧩 Fable delivered better results on the elevator simulation, contact lens case, and archery game.
🎬 Astra struggled with the terminal movie tracker because of flickering, formatting issues, and broken TMDB search.
📝 Fable clearly outperformed Astra on the Obsidian clone, with working image generation and OpenCode agent integration.
🎨 Astra often relied on repetitive green themes, cards, grids, and generic landing-page designs.
💸 Astra cost approximately $198 in tokens, compared with around $113 for Fable during these tests.
⚙️ Results may vary depending on the agent setup, tools, subscription plans, and thinking level used.
👍 Despite Astra’s strong benchmark score, Fable 5.1 was more reliable and produced better results on larger projects. Receive SMS online on sms24.me

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