Fable 5.1 — Model Drop — Dropday.ai

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Fable 5.1

AnthropicDropped Sep 1, 202657 builds54 makers15 prompts

Stronger long-horizon agentic coding and multistep research with 75% cheaper cache reads.

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The most interesting things people are building with AI, all in one place — followed and tracked as they evolve from first demo to real product.

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Rocket League in Three.js

Modern House Walkthrough

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About this release

What is Fable 5.1?

Claude Fable 5.1 is the generally available successor to Claude Fable 5. It extends the prior model with improved performance on demanding reasoning, long-running agentic coding, multistep research, and document/spreadsheet/slide work while keeping the same base token pricing and adding significantly cheaper cache reads. It features refined safeguards that reduce false positives on benign requests.

Read the official Anthropic launch page

Worth opening first

Standouts

Rocket League in Three.js

Rocket League in Three.js

A physics-driven 3D Rocket League clone built with a local LLM agent.

Modern House Walkthrough

Modern House Walkthrough

AI-driven architecture design and automated 3D walkthrough rendering via Blender.

What happens to the brain while you’re learning?

What happens to the brain while you’re learning?

A cinematic AI visualization of neural connections forming during the learning process.

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Playable38 Prompts15 Build-a-long1 More builds13

Playable

38

IRON HARBOR JUNCTION

IRON HARBOR JUNCTION

A detailed interactive voxel-art model train layout in your browser.

Toys

Devin CLI

The frontier coding agent harness featuring lead-and-sidekick model pairing.

agent

Suspicious Package

Suspicious Package

A browser-based game integrating realtime AI video into a Three.js canvas.

Games

Prompts

15

IRON HARBOR JUNCTION

IRON HARBOR JUNCTION

A detailed interactive voxel-art model train layout in your browser.

Toys

Devin CLI

The frontier coding agent harness featuring lead-and-sidekick model pairing.

agent

Minecraft (three.js)

Minecraft (three.js)

A functional Minecraft clone built in a single prompt using Fable 5.1

Games

AI Website Cloner Template

Open sourcePrompt

AI Website Cloner Template

Clone any website with one command using AI coding agents.

agent

Build-a-long

1

Exonix

A 3D arcade game built by the Claude Code AI agent.

Games

More builds

13

Rocket League in Three.js

Rocket League in Three.js

A physics-driven 3D Rocket League clone built with a local LLM agent.

Games

Browse all 57 Fable 5.1 builds in the feed

Built something with Fable 5.1?

Paste the URL and Dropday.ai will credit you, track the build as it evolves, and put it on this drop.

Modern House Walkthrough

Modern House Walkthrough

AI-driven architecture design and automated 3D walkthrough rendering via Blender.

Video

What happens to the brain while you’re learning?

What happens to the brain while you’re learning?

A cinematic AI visualization of neural connections forming during the learning process.

Video

BLACKSITE

A Three.js wave-survival FPS with procedural assets and Rapier physics

Games