Fable 5.1 users publish interactive browser worlds

• Browser-native work is the dominant creator pattern so far: games, city scenes, shaders and simulations appear throughout minchoi's ten-example thread.
• A Dark Souls-meets-Diablo browser game from MengTo's build reportedly fits in 222 KB of code, with no asset files and a 7 KB Web Audio sound system.
• A Kyoto-themed Three.js site with tatami rooms, sliding doors, a plastic menu and a retro footer is now open source in MengTo's post.
• One same-prompt racing-game comparison reported 1.2 million tokens and $123.98 for Fable 5.1, versus 897,000 and $95.87 for Fable 5, according to om_patel5.

A single property photo became a cinematic walkthrough in minchoi's collection. The same set includes a neo-gothic shader from minchoi and an interactive model train yard from minchoi. A separate fable51-worlds repository describes agents researching, modelling and quality-checking real-place reconstructions before shipping them as plain Three.js apps.

MengTo's Dark Souls-meets-Diablo experiment pushes the browser-game constraint unusually far: all visual content, game logic and nearly all sound are code.

• 222 KB of code in total
• Zero asset files
• Procedural textures, models and sound effects
• A 7 KB Web Audio synthesis system for sound effects
• Text-only genre references for stamina, dodge rolls, barbarian skills and a Souls-style boss

The AWS availability announcement frames Fable 5.1 around codebase-spanning work, code review and performance tasks across multi-hour sessions. LLMJunky’s RocketLeagueBench run offers a creator-side version of that claim: a two-prompt build that reportedly took about 20 minutes, compared with more than an hour on Fable 5.

The first passes were flawed, LLMJunky wrote, but the model kept reviewing its own output and cleared 98% of the bugs they had noticed before it handed over the project.

minchoi's thread is a rough index of the formats now being shared, rather than a quality ranking:

1. A Call of Duty clone, from minchoi.
2. A GTA-style multiplayer build in New York City, from minchoi.
3. A cinematic walkthrough generated from one photo, from minchoi.
4. A Trackmania physics-engine rewrite in pure C, from minchoi.
5. An unnamed visual-aesthetic experiment, from minchoi.
6. A neo-gothic world implemented as a shader, from minchoi.
7. A prompted war-zone video, from minchoi.
8. An interactive model train yard, from minchoi.
9. A World War I voxel simulator, from minchoi.
10. A Minecraft and Red Dead Redemption mashup, from minchoi.

MengTo open-sourced a Kyoto-themed Three.js site built around tatami spaces, sliding doors, a 3D plastic menu and a retro footer animation. Its whole experience is procedural code, which he said makes large visual changes promptable.

The build notes MengTo published alongside an earlier Three.js experiment show where the automated pass ended and art direction began:

• Unspecified images produced generic AI illustrations.
• Difficult 3D subjects, including people and dogs, used Higgsfield 3D models.
• Texture, lighting, modelling and small details needed explicit improvement passes.
• Overlaps, negative space and scroll behavior still received manual fixes.
• Particle, VHS and CRT effects came from ThreeUI and Canvas UI.

A same-prompt test from om_patel5 asked Fable 5 and Fable 5.1 to build a racing game from scratch, including Blender assets with PBR materials, Godot integration, driving physics and a HUD. The post says each got one unattended run.

• Fable 5: 897,000 tokens, $95.87, 57.3 minutes.
• Fable 5.1: 1.2 million tokens, $123.98, 59.8 minutes.

The post judged the 5.1 world more detailed and alive, while reporting nearly identical elapsed time and about 30% more spend.