Felix Rieseberg on Fable 5.2: beats Opus on long tasks, but Opus 5.5 still wins for daily work

mattshumer_ · x · 2026-11-10

Felix Rieseberg shares hands-on tips for Fable & Mythos 5.2: Fable beats Opus on big, long tasks like rewriting whole codebases, drafting large artifacts, and exploring ambiguous scenarios. He expects heavy use for Rust ports, journalist investigations, and research. For everyday work he still prefers Opus 5.5 — Fable has a big brain but thinks slower.

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