Descriptions:
Fahd Mirza tests Claude Fable 5 — Anthropic’s newly launched frontier model at $10 per million input tokens and $50 per million output tokens — on a demanding real-world task: generating a fully self-contained interactive aerospace analysis dashboard from a dense wind tunnel research image. The result is a multi-tab HTML application with lift/drag plots, CFD flow visualization, governing equations, and experimental data panels, produced in a single prompt over roughly ten minutes of generation time.
Before the live demo, Mirza reviews Fable 5’s benchmark performance in depth. Agentic coding on SWE-bench Pro reaches 80.3% compared to Claude Opus 4.8 at 69% and GPT 5.5 at 58%. On the Frontier Code Diamond subset — the hardest 50 of 150 tasks — Fable 5 scores 29.3%, roughly double Opus 4.8. Additional benchmarks covering spatial reasoning, computer use, legal tasks, and biology are also shown, with the Mythos-class models leading by clear margins across nearly every category.
Mirza also covers the model’s architecture context: Fable 5 uses the same underlying system as the restricted Claude Mythos 5, which remains available only to select infrastructure and security partners. Safety-triggered fallbacks to Opus 4.8 apply on cybersecurity, biology, and large-scale distillation queries. The video closes with a cost note — the aerospace demo burned a meaningful amount of credits — positioning Fable 5 as a capable but expensive tool for genuinely complex tasks.
📺 Source: Fahd Mirza · Published June 09, 2026
🏷️ Format: Review
