Guides · 12 pages
Building with Fable 5.1
How Anthropic's newest model behaves differently, and how to work with it.
Building with Fable 5.1What Claude Fable 5.1 changes for vibe codersThe new top model behaves differently. Here's what actually matters when you're building.Building with Fable 5.1Effort levels, and which one to useThe one dial that controls speed, cost and depth on Fable 5.1.Building with Fable 5.1Thinking is always on. Here's what that means.You can't switch it off, you can't see the raw reasoning, and both are fine.Building with Fable 5.1Working with fifteen-minute turnsFable 5.1 takes longer per request and does far more. Adjust your rhythm.Building with Fable 5.1Your old prompts are too bossyStep-by-step scaffolding that helped earlier models actively hurts Fable 5.1.Building with Fable 5.1Letting it run without youFable 5.1 can work unattended for a long time. Set it up so that's safe.Building with Fable 5.1Keeping its changes surgicalFable 5.1 likes to rewrite the file and add tests you didn't ask for. Here's the fix.Building with Fable 5.1Getting a summary you can actually readFable 5.1 writes well, and sometimes too densely. Tune it once.Building with Fable 5.1Give it somewhere to remember thingsFable 5.1 works notably better with a place to write down what it learns.Building with Fable 5.1When it refuses something ordinaryFable 5.1 has safety classifiers that can decline outright. Here's why, and what to do.Building with Fable 5.1What Fable 5.1 costs, and when it's worth itRoughly double Opus. Here's how to spend that well.Building with Fable 5.1Building games and apps with Fable 5.1A practical way of working, for the things you actually want to make.