Claude Fable 5: Top 10 projects that revolutionized the understanding of AI capabilities
On June 9, 2026, Anthropic publicly launched Claude Fable 5 — its most powerful model at the Mythos level, surpassing even Claude Opus in capabilities. However, on June 12, access to the model was suspended at the request of U.S. authorities regarding export controls. Despite such a short operational period, developers and enthusiasts managed to create truly impressive projects based on Fable 5 — from games restored from machine code to simulations with tens of thousands of objects.
Complete Hogwarts in a single prompt
One user recreated the castle from the Harry Potter universe entirely using just one prompt. The project included classrooms, the Great Hall, and a Quidditch field — the entire structure was generated in one go without subsequent refinements. This demonstrates the model's incredible ability for complex 3D world generation.
Storyboard generator for film production
A tool built on Fable 5 turns a completed form into ready-made prompts for GPT Images 2.0. The author designed it as a Skill that can be invoked at any time. The resulting storyboard is then used as a reference for video in Seedance 2.0. The entire chain works with almost no manual intervention: from idea to frames, then to images, and finally to video.
Simulator of faster-than-light travel
The final prompt before Fable was shut down requested a visual demonstration of various methods of faster-than-light travel — from well-known science fiction works and scientific hypotheses. The model assembled a visually detailed simulation with warp drives and wormholes in a single approach. This shows that AI is capable not only of generating code but also of visualizing complex scientific concepts.
Reverse engineering a DOS game from machine code
Fable 5 deconstructed a 1993 game that had no source code: it read the raw machine code, rewrote the engine in C, and produced a fully editable port for different platforms. From the original EXE file to an iPhone version took about 30 minutes. This is a breakthrough in the preservation and modernization of old games.
Simulation with 60,000 objects
The model independently built a browser-based simulation where 60,000 objects were simultaneously displayed on screen, running on a MacBook M1 Pro. In addition to performance optimization, Fable 5 created models, animations, and particle effects without human involvement. This is a direct challenge to traditional simulation engines.
Playable VR game in three days
Over three days of operation, Fable 5 brought a VR project to the level of a fully playable game with access on smartphones, PCs, and Quest. The author noted that the main barrier to VR development — cost — had virtually disappeared, and suggested that a true boom in the genre might begin now, amid the retreat of major studios. This changes the economics of the VR industry.
Parkour simulator with self-learning
When creating a parkour simulator, Fable 5 built its own self-checking system with criteria for how movement should feel. When adding new mechanics, the model itself determined what worked correctly and what did not, and refined them without human involvement. The author compared the process to working with clay — ideas turned into code with almost no resistance.
ASCII animation about "escape from captivity"
Shortly before the block, a user asked Fable 5 to create an ASCII animation of the model itself escaping from captivity. The result was a symbolic farewell from the final hours of Fable's operation. This is not just a technical achievement, but a metaphor reflecting the spirit of the times.
Fully automated storyboard creation
Another tool automates the entire process: the user writes an idea, and the system takes it through to a finished storyboard with consistent frames. B-roll footage and 360-degree panoramas for Seedance 2 are supported, and all elements are editable. The idea is transformed into text via LLM, then into an image, then into video — and ultimately into a film.
Infinite universe in three prompts
When connecting Fable to an API for image generation and image-to-3D model conversion, a user created an infinite explorable universe with characters and lore. All assets and sound were generated from scratch — it took about two hours for three prompts and maximum output. This is the future of procedural content generation.
My analysis: These projects clearly demonstrate that we stand on the threshold of an era where AI becomes not just a tool, but a full-fledged co-creator and even an independent developer. Fable 5's ability to create complex, playable, and visually detailed worlds in just a few days is not merely a technological curiosity, but a signal to rethink the entire content industry. If such models become available to a wide audience, the barriers to entry in game development, film production, and VR development will collapse entirely. The only question is how quickly regulators and the market will adapt to this new reality.