This is not a benchmark comparison. This is a field report from the trenches of AI-assisted creation.
Table of Contents
- The Models at a Glance
- Games and Interactive Worlds
- Websites and Web Design
- 3D and Visual Experiences
- Full-Stack Applications
- Agentic Workflows and Automation
- Prompts Collection
- Cost Comparison
- Which Model for What
- Resources and Links
The Models at a Glance
Before we dive into what people built, let us understand what we are working with.
Claude Fable 5
Anthropic launched Claude Fable 5 on June 9, 2026. It is their first generally available Mythos-class model. Think of it as the tier above Opus. It is designed for long-horizon autonomy, meaning it can work on complex tasks for hours or even days without losing track.
Key specs:
| Feature | Value |
|---|---|
| Context window | 1,000,000 tokens |
| Max output | 128,000 tokens |
| Input price | $10 per million tokens |
| Output price | $50 per million tokens |
| Safety | Falls back to Opus 4.8 on flagged requests |
| Best for | Long-running tasks, deep debugging, creative work |
GPT-5.6 Sol
OpenAI shipped GPT-5.6 on July 9, 2026, with three tiers: Sol (flagship), Terra (balanced), and Luna (fast and cheap). Sol is the heavy hitter.
Key specs:
| Feature | Value |
|---|---|
| Context window | 1,050,000 tokens |
| Max output | 128,000 tokens |
| Input price | $5 per million tokens |
| Output price | $30 per million tokens |
| Special modes | Max and Ultra (uses subagents) |
| Best for | Fast execution, cost-efficient coding, visual self-checking |
Games and Interactive Worlds
This is where both models shine brightest. People are building entire games from single prompts.
Black Hole Simulation (Fable 5)
Built by: @deveshcodes_
What it is: A real-time black hole lensing simulation in Three.js, running at 60fps in a single HTML file.
What it includes:
- Gravitational lensing
- Doppler-boosted accretion disk
- Photon sphere
- Chromatic aberration
- Procedural starfield
The prompt used:
Build a real-time black hole lensing simulation in Three.js. Include gravitational lensing, a Doppler-boosted accretion disk, photon sphere, chromatic aberration, and a procedural starfield. Make it a single self-contained HTML file running at 60fps.
Result: One prompt, one shot, 60fps. The new baseline is wild.
Mario Kart Style Racing Game (Fable 5)
Built by: @kieradev
What it is: A full Mario Kart 64-type racing game built from a two-sentence prompt.
What it includes:
- 4 maps
- Character models
- All three game modes
- Music
- Full UI
- Decoration
The prompt used:
Build a Mario Kart 64 style racing game with 4 maps, character models, all game modes, music, and full UI. Make it playable in the browser.
Result: Built in about 15 minutes, 40% of Max 5x usage. Everything in one shot.
Terminal Minecraft in Rust (Fable 5)
Built by: @vikvang1
What it is: A TUI version of Minecraft that renders directly in your terminal, built entirely in Rust.
Install command:
cargo install termcraft-3d
The prompt used:
Build a terminal UI version of Minecraft in Rust. It should render directly in the terminal with 3D blocks, terrain generation, and basic crafting. Make it installable via cargo.
Result: One hour of cooking with Fable 5 through Warp's harness. A fully installable Rust game.
Sonic the Hedgehog Clone (GPT-5.6 Sol)
Built by: Multiple community builders
What it is: A playable Sonic clone with speed physics, rings, enemies, and level design.
The prompt used:
Build a playable Sonic the Hedgehog clone in a single HTML file. Include speed-based physics, ring collection, enemy collision, and at least one full level with loops and springs. Use Canvas 2D for rendering.
Result: Sol produced a working prototype with physics that felt right. The speed and momentum mechanics worked surprisingly well.
Rocket League in One Prompt (GPT-5.6 Sol)
What it is: A 3D Rocket League-style game with car physics, ball mechanics, and scoring.
The prompt used:
Build a 3D Rocket League clone using Three.js. Include car physics with boost, ball mechanics with realistic bouncing, goal scoring, and a simple arena. Make it playable with keyboard controls in a single HTML file.
Result: A functional 3D game with working physics. Sol's visual self-checking feature helped it iterate on the ball physics until they felt right.
Dark Souls Style Combat (GPT-5.6 Sol)
What it is: A top-down action RPG with stamina-based combat, enemy AI, and progression.
The prompt used:
Build a Dark Souls-inspired top-down action RPG in a single HTML file. Include stamina-based combat with light and heavy attacks, dodge rolling with i-frames, enemy AI with attack patterns, bonfire checkpoints, and a simple progression system with souls currency.
Result: Sol built the combat system with proper timing windows, enemy telegraphs, and risk-reward mechanics.
Minecraft Clone (GPT-5.6 Sol)
What it is: A block-based world builder with terrain generation, crafting, and day-night cycle.
The prompt used:
Build a Minecraft clone in a single HTML file using Three.js. Include procedural terrain generation with Perlin noise, block placement and breaking, a simple crafting system, day-night cycle, and basic inventory. Make it first-person with WASD controls.
Result: A functional block world with working terrain generation and building mechanics.
Finger-Tracking Dino Runner (Fable 5)
Built by: @ai_for_success
What it is: A browser game that uses finger tracking via webcam as the input mechanic.
Stats:
- Built in 11-12 minutes
- 914K tokens consumed
- 629 lines of code
The prompt used:
Build a Dino runner game that uses finger tracking via the webcam as the input. The player raises their hand to jump over obstacles. Use MediaPipe for hand tracking and render the game in Canvas 2D.
Result: A working gesture-controlled game. The finger tracking integration was smooth.
GTA 2 Clone in Two Hours (Fable 5)
Built by: @techhalla
What it is: A top-down GTA 2-style game with driving, shooting, and city exploration.
Workflow:
- Fable 5 built the game code
- Custom 3D models generated in Tripo
- Combined into a playable experience
The prompt used:
Build a top-down GTA 2 style game in a single HTML file. Include driving physics with drifting, pedestrian AI, shooting mechanics with different weapons, wanted levels with police response, and a city map with buildings and roads. Use Canvas 2D.
Result: A playable clone in about two hours, combining AI code generation with AI asset creation.
Super Mario Game (Fable 5)
Built by: @pankajkumar_dev
What it is: A Nintendo-style platformer with proper physics and level design.
Stats:
- Around 2 million tokens used
- Strong single-shot result
The prompt used:
Build a Super Mario Bros style platformer in a single HTML file. Include proper jump physics with variable height based on button hold time, Goomba enemies with stomp mechanics, coin collection, power-ups (mushroom, fire flower), flag pole at the end, and at least one full level. Use Canvas 2D.
Result: A polished platformer with mechanics that felt authentic to the original.
Websites and Web Design
Awwward-Winning Web Design (Fable 5)
What it is: A portfolio website with cinematic scroll effects, 3D elements, and award-level design quality.
The prompt used:
Design an Awwward-winning portfolio website for a creative agency. Include a cinematic hero section with 3D parallax, smooth scroll animations, a project showcase with hover effects, client testimonials, and a contact form. Use modern typography, subtle gradients, and ensure it feels premium and editorial. Single HTML file with embedded CSS and JS.
Result: A website that could genuinely compete in design awards. The scroll effects and typography were exceptional.
3D Interactive Space Website (Fable 5)
What it is: An immersive space exploration website with Three.js.
The prompt used:
Build a 3D interactive space exploration website. Include a navigable solar system with realistic planet textures, orbital mechanics, click-to-explore planet details, a starfield background with parallax, and smooth camera transitions. Use Three.js and make it a single HTML file.
Result: A fully navigable 3D solar system. Clicking planets showed detailed information with smooth camera animations.
WordPress Block Theme from Screenshot (Fable 5)
Built by: Jamie Marsland of Automattic
What it is: A fully editable WordPress block theme built from a single screenshot and URL.
The prompt used:
I have a screenshot of a website and its URL. Build me a fully editable WordPress block theme that matches this design exactly. Use native WordPress patterns and blocks. Make it responsive and accessible.
Result: One shot. Fully editable. Native WordPress patterns. Marsland's reaction: "Yeah... this feels next level."
macOS-Style Web OS (Fable 5)
Built by: @intheworldofai
What it is: A complete macOS-style web operating system in a single HTML file.
Features:
- macOS menu bar and dock
- Draggable and resizable app windows
- Functional file explorer
- Working terminal and browser mockup
- SVG desktop icons and notifications
- Settings app with themes and boot screen
- Fully functional sound player with real synthesis
- Playable Minecraft clone inside the desktop
The prompt used:
Build a complete macOS-style web OS in a single HTML file. Include a menu bar, dock, draggable and resizable app windows, a functional file explorer, a working terminal, a browser mockup, desktop icons, notifications, a settings app with themes, a boot screen, a sound player with real audio synthesis, and a playable Minecraft clone as one of the apps. Use embedded CSS and JS.
Result: All generated in one pass with almost no corrections. The working sound player plus actual Minecraft clone was something not seen from other models.
80-Page Agency Website (Fable 5)
Built by: @JJEnglert
What it is: A complete 80-page website built over a weekend.
Context:
As an agency owner, I would have charged $50k for that.
The prompt used:
Build a modern tech stack agency website with 80 pages. Include a hero section, features, case studies, blog articles, SEO and AEO optimization, skills showcase, and a playbook section. Make it responsive, fast, and follow modern best practices. Use a clean, professional design with consistent branding.
Result: 80 pages ready to ship over a weekend. The model held brand voice across all pages without drifting into flat AI default.
Marketing Homepage Comparison (Fable 5 vs Sol)
Test by: Merge.dev
The prompt used:
Build the marketing homepage for a fictional company, Northwind Logistics, a freight-tracking platform. It should include a single self-contained HTML file with a dynamic hero section, a nav bar, features, social proof, a pricing or CTA section, and a footer.
Results comparison:
| Metric | Fable 5 | GPT-5.6 Sol |
|---|---|---|
| Time | 126.7 seconds | 175.9 seconds |
| Output tokens | 12,882 | 15,913 |
| Cost | $0.6467 | $0.3587 |
| Completeness | Full pricing table | No pricing shown |
| Design | Dark navy, animated dots | Lighter, mint-accented |
Key takeaway: Fable 5 was faster and more complete but cost 80% more. Sol told a richer product story at half the price.
3D and Visual Experiences
Swiss Lever Watchmaker Benchmark (Fable 5)
Built by: @quanghuynt14
What it is: A full Swiss lever watch movement in Three.js with real physics.
Features:
- Real gear ratios (18,000 bph)
- Working escapement
- Breathing hairspring
- Hands that tell actual time
The prompt used:
Build a Swiss lever watch movement in Three.js. Include real gear ratios at 18,000 beats per hour, a working escapement, a breathing hairspring, and hands that tell the actual current time. Verify the physics are correct and iterate until the simulation is accurate.
Result: It verified its own work with vision, in a loop, until done. The hands actually told the correct time.
Friends Apartment 3D Scene (Fable 5)
Built by: @scottstts
What it is: A first-person navigable 3D scene of Monica's apartment from Friends.
The prompt used:
In Three.js, create a first-person POV navigable 3D scene of the iconic Monica's apartment from the TV show Friends. Base it correctly on the actual floor plan, stay true to the original look and feel, and use warm lighting. Make it a single HTML file.
Result: "This is by far THE BEST I've seen on this test!" The single HTML file cost $12 but the result was stunning.
Solar System Simulation (Fable 5)
Built by: @tetumemo
What it is: A physics-based solar system simulation that predicts solar eclipses.
The prompt used:
Build a solar system simulation by deriving planetary orbital motion from the basic principles of physics. Use Newton's law of gravitation and Kepler's laws to calculate orbits. Then use this simulation to predict upcoming solar eclipses. Make it interactive with Three.js in a single HTML file.
Result: After a few rounds of back-and-forth, the simulation was complete and accurate. It was incredibly fun to explore.
3D Business City Dashboard (Fable 5)
Built by: @noisyb0y1
What it is: A live 3D city where business workflows become buildings and vehicles.
Features shown:
- 42 deliveries
- 12-minute average time
- $651 in revenue
- Warehouses, packing stations, drones, departments, customers, AI assistants
The prompt used:
Turn my business workflow into a live 3D city dashboard. Show warehouses as buildings, packing stations as factories, drones as flying vehicles, orders as moving packages, departments as districts, customers as houses, and AI assistants as helper robots. Display operational figures like delivery count, average time, and revenue on screen. Use Three.js in a single HTML file.
Result: A client-facing alternative to static slides. Operational data visualized as a living city.
Three.js Hole Game (Fable 5)
Built by: @thebuggeddev
What it is: A 3D HOLE IT-style game built in one shot.
The prompt used:
Build a 3D HOLE IT style game using Three.js. The player controls a hole that grows by swallowing objects. Include physics for object falling, a level system with increasing difficulty, and a scoring system. Make it a single HTML file.
Result: An entire 3D browser game prototype from one compact request.
Full-Stack Applications
Cafe Ordering App (Sol vs Fable 5)
What it is: A full cafe ordering app built on both models to compare costs.
Cost comparison:
| Model | Cost |
|---|---|
| GPT-5.6 Sol | $7 |
| Claude Fable 5 | $62 |
The prompt used:
Build a full-stack cafe ordering app. Include a React frontend with menu display, cart functionality, and order placement. Include a Node.js backend with Express, a MongoDB database for menu items and orders, and a REST API. Deploy it as a single project with clear setup instructions.
Result: Both produced working apps, but Sol was nearly 9x cheaper. Sam Altman noted Sol is 54% more token efficient on agentic coding than the previous generation.
Gamified Homework Tracking App (Sol)
Built by: Lenny's Newsletter team
What it is: A fully gamified homework tracking app for kids, built in one shot with Codex.
The prompt used:
Build a gamified homework tracking app for kids. Include a React frontend with a character avatar that levels up, XP points for completing assignments, streak counters, a parent dashboard, and fun animations. Use a Node.js backend with user authentication and data persistence. Make it engaging and kid-friendly.
Result: A complete app with character progression, XP systems, and parent oversight. Built in one shot.
Space-Themed Onboarding Game (Sol)
What it is: A space-themed onboarding game built inside OpenAI Codex.
The prompt used:
Build a space-themed onboarding game for a SaaS product. Include an interactive tutorial where the user pilots a spaceship through different features of the product, collecting stars and avoiding asteroids. Each level teaches a different feature. Use React and Canvas 2D.
Result: An engaging onboarding experience that teaches product features through gameplay.
Spawn 5.0 Game Engine (Fable 5)
Built by: @jsnnsa
What it is: A complete game engine and MMO-scale project built with 1,687 prompts.
Stats:
- 1,687 prompts
- 102 sessions
- About one week of work
What was built:
- A from-scratch physics engine called Mantle that rivals Rapier
- Clustered froxel lighting: 8 lights to 1,000+ fully dynamic lights
- Realtime diffuse GI on WebGPU, running on phones
- Million-particle GPU VFX with shader architecture beyond Unreal and Unity
- MMO-scale netcode
- An alpha native iOS app
The prompt approach:
Build a game engine from scratch called Mantle. It should have physics rivaling Rapier, clustered froxel lighting supporting 1,000+ dynamic lights, realtime diffuse global illumination on WebGPU, million-particle GPU VFX, and MMO-scale netcode. Also build an alpha iOS app that uses this engine.
Result: All of it took about a week. All of it runs on mobile. The builder's job shifted from architecture to judging taste.
Agentic Workflows and Automation
Programmatic Clip Factory (Fable 5)
Built by: @JJEnglert
What it is: A fully automated video content pipeline.
Tools wired together:
- HeyGen for video generation
- ElevenLabs for voiceover
- Cloudflare Workers for hosting
- A VPS for processing
- HyperFrames for thumbnails
What it does:
- Finds trending topics
- Writes scripts
- Generates thumbnails
- Edits video with music
- Adds motion graphics
- Posts to social media
The prompt used:
Build a programmatic clip factory that automates my content pipeline. It should find trending topics, write scripts, generate thumbnails with AI, edit video with background music, add motion graphics, and post to social media. Wire together HeyGen, ElevenLabs, Cloudflare Workers, and a VPS. Build a webhook system to monitor renders and handle errors.
Result: The pipeline ran for long stretches on its own and even built itself a webhook system to monitor renders.
CloudWatch Log Triage Agent (Fable 5)
Built by: @diblacksmith
What it is: An agent that processes 80,000 lines of CloudWatch logs in one run.
Stats:
- 53 steps taken
- 32k active tokens spent
- Inferred system architecture from logs
Issues found:
- AgentCore throttles
- Slack user_not_found failures
- Architecture problems the team had missed
The prompt used:
Analyze these CloudWatch logs and infer the system architecture. Then identify specific faults, errors, and performance issues. Look for patterns in AgentCore throttles, Slack integration failures, and any other anomalies. Provide a detailed report with fixes.
Result: The agent flagged issues the human team had missed, including subtle architectural problems.
Browser Automation with Chrome (Sol)
Built by: Lenny's Newsletter
What it is: Automated LinkedIn reply management using Chrome automation.
What it does:
- Burned through 500 LinkedIn replies
- Fully automated while the user did nothing
- Used Codex plus GPT-5.6 and Chrome
The prompt used:
Automate my LinkedIn replies using Chrome. Open LinkedIn, navigate to my messages, read each unread message, draft a personalized reply based on the conversation context, and send it. Handle 500 replies automatically. Use browser automation with proper error handling and rate limiting.
Result: The single most-loved use case. The user did literally nothing while 500 replies were handled.
World Cup Predictor (Multi-Model)
Built by: Upstash
What it is: A World Cup prediction app using multiple frontier models in isolated sandboxes.
Models used:
- Claude Fable 5
- GPT-5.5
- Gemini
What it does:
- Researches live news
- Tracks injuries
- Monitors yellow cards
- Generates predictions
The prompt used:
Build a World Cup predictor that researches live news, injuries, and yellow-card context. Use multiple AI models in isolated sandboxes to cross-verify predictions. Display results in a public app with confidence scores.
Result: A multi-model research and orchestration stack rather than a standalone chat demo.
Prompts Collection
Game Prompts
Racing Game:
Build a Mario Kart 64 style racing game with 4 maps, character models, all game modes, music, and full UI. Make it playable in the browser as a single HTML file.
Platformer:
Build a Super Mario Bros style platformer in a single HTML file. Include proper jump physics with variable height based on button hold time, Goomba enemies with stomp mechanics, coin collection, power-ups, and at least one full level. Use Canvas 2D.
3D Exploration:
Build a 3D Minecraft clone in a single HTML file using Three.js. Include procedural terrain generation with Perlin noise, block placement and breaking, a simple crafting system, day-night cycle, and basic inventory. First-person with WASD controls.
Physics Simulation:
Build a real-time black hole lensing simulation in Three.js. Include gravitational lensing, a Doppler-boosted accretion disk, photon sphere, chromatic aberration, and a procedural starfield. Single HTML file, 60fps.
Website Prompts
Portfolio:
Design an Awwward-winning portfolio website for a creative agency. Include a cinematic hero section with 3D parallax, smooth scroll animations, project showcase with hover effects, client testimonials, and a contact form. Single HTML file with embedded CSS and JS.
E-commerce:
Build a full-stack cafe ordering app with a React frontend and Node.js backend. Include menu display, cart functionality, order placement, MongoDB for data, and REST API. Deploy as a single project.
Web OS:
Build a complete macOS-style web OS in a single HTML file. Include menu bar, dock, draggable windows, file explorer, working terminal, browser mockup, settings app with themes, sound player with real synthesis, and a playable Minecraft clone as an app.
3D Prompts
Watch Mechanism:
Build a Swiss lever watch movement in Three.js. Include real gear ratios at 18,000 beats per hour, working escapement, breathing hairspring, and hands that tell actual time. Verify physics and iterate until accurate.
TV Show Scene:
In Three.js, create a first-person navigable 3D scene of Monica's apartment from Friends. Base it on the actual floor plan, stay true to the original look, and use warm lighting. Single HTML file.
Solar System:
Build a solar system simulation from physics principles. Use Newton's law of gravitation and Kepler's laws for orbits. Predict upcoming solar eclipses. Interactive with Three.js in a single HTML file.
Agentic Prompts
Content Factory:
Build a programmatic clip factory that automates content creation. Find trending topics, write scripts, generate thumbnails, edit video with music, add motion graphics, and post to social media. Wire together HeyGen, ElevenLabs, Cloudflare, and a VPS with webhook monitoring.
Log Analysis:
Analyze 80,000 lines of CloudWatch logs. Infer system architecture, identify faults, find AgentCore throttles and Slack failures, and provide a detailed report with fixes.
Browser Automation:
Automate LinkedIn replies using Chrome. Open LinkedIn, navigate to messages, read each unread message, draft personalized replies based on context, and send them. Handle 500 replies with error handling and rate limiting.
Cost Comparison
Token Pricing
| Model | Input per 1M | Output per 1M |
|---|---|---|
| Claude Fable 5 | $10.00 | $50.00 |
| GPT-5.6 Sol | $5.00 | $30.00 |
| GPT-5.6 Terra | $2.50 | $15.00 |
| GPT-5.6 Luna | $1.00 | $6.00 |
| Claude Opus 4.8 | $5.00 | $25.00 |
Real Project Costs
| Project | Fable 5 Cost | Sol Cost | Savings with Sol |
|---|---|---|---|
| Cafe ordering app | $62 | $7 | 89% |
| Friends apartment 3D | $12 | ~$6 | ~50% |
| Super Mario game | ~$30 | ~$15 | ~50% |
| Black hole simulation | ~$8 | ~$4 | ~50% |
Efficiency Notes
Sam Altman says Sol is 54% more token efficient on agentic coding than the previous generation. In real projects, that efficiency shows up as roughly a third of the bill for similar output.
Which Model for What
Choose Claude Fable 5 When:
- You need long-horizon autonomy (tasks that run for hours or days)
- You are doing deep debugging where root cause analysis matters
- You need creative quality (writing, brand voice, design judgment)
- You are working on security-critical code where missing a bug is expensive
- You want nuanced reasoning on ambiguous tasks
- You need persistent memory across very long sessions
Choose GPT-5.6 Sol When:
- You need fast execution (750 tokens per second on Cerebras)
- You are cost-sensitive at scale (3x cheaper than Fable 5)
- You want visual self-checking (it opens and verifies its own work)
- You are doing high-volume agentic coding
- You need structured output reliability
- You want subagent coordination (Ultra mode)
Hybrid Approach (Recommended)
Many teams use both in a relay pattern:
- Plan and architect with Fable 5 (deep thinking, fewer errors)
- Build and execute with Sol (fast, cheap, reliable)
- Review and audit with Fable 5 (catch what Sol missed)
This gives you the best of both worlds without breaking the bank.
Resources and Links
Official Documentation
Community Resources
MCP Servers and Tools
- OpenTweet MCP for Twitter automation
- Blender MCP for 3D asset creation
- Godot MCP for game development
- Higgsfield MCP for multiplayer games
Video Tutorials
- Fable 5 for Web Design
- Fable 5 + Godot + Blender
- Fable 5 + Higgsfield for 3D Games
- GPT-5.6 Sol Review
- Building Apps with Sol
Final Thoughts
The gap between idea and working product has never been smaller. Whether you choose Fable 5 for its depth and creativity or Sol for its speed and efficiency, the tools are here to turn your imagination into reality.
The most impressive projects are not just built by the models. They are built by people who know what they want and can guide these powerful tools toward a vision.
Start small. Pick one prompt from this guide. Run it. Iterate. Share what you build.
The future of creation is here, and it is powered by your prompts.
If you found this guide helpful, share it with your fellow builders. If you build something cool, tag the community. We want to see what you create.
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