Summary
Matthew Berman puts Claude Fable 5.2 through some of the largest autonomous builds he has attempted. The headline demo is a playable Gears of War-style level built in Unreal Engine from a three-line prompt, which he says consumed around 8 to 12 billion tokens, roughly $15,000 at API pricing.
Other projects include a browser-based Microsoft Excel clone that took almost 50 hours and includes working formulas and pivot tables, and a DaVinci Resolve-style video editor. Berman also shows a from-scratch WebGL2 ray-tracing simulation of a bullet piercing a water balloon (about 41 million tokens, 2.5 hours, an estimated $91) and a 3D-printable tower designed for a Bambu Lab P2S that held a stack of laptops, an iPad, and a power drill.
The video also covers motion graphics generated from single prompts, including explainers on software decompiling and how LLMs work, with token counts, time, and cost reported for each. It gives a concrete sense of what long-running agentic builds with Fable 5.2 can produce and what they cost. The video includes a sponsor segment for Eight Sleep.
📺 Source: Matthew Berman · Published November 09, 2026
🏷️ Format: Showcase
