Claude Fable 5 Built This in Claude Code and I'm Blown Away
Claude Fable 5 is here. Learn how to run Anthropic's new Mythos class model through a real agentic coding workflow in Claude Code so you can build a browser based ray tracing game from a single prompt, without writing the rendering engine yourself. 🎁 Get the free 7-Day AI Builder Challenge + resources for this video: https://skool.com/leonvanzyl In this video, I put Claude Fable 5 to the test with one genuinely hard challenge: build a browser based game with real reflections and ray tracing, including its own rendering, shader, camera, and material systems. You'll learn how to select Fable 5 in Claude Code and tune the reasoning effort, plan and break the build into feature files using my RAMP framework, and implement every feature on autopilot with background review agents, then compare the result against GPT 5.5. =========================== Resources Mentioned =========================== 📦 Source code, prompts, workflows + peer discussion: https://skool.com/leonvanzyl =========================== Go Deeper with Agentic Labs =========================== 🧪 AI coding courses, live Q&A, weekly builder challenges, direct access to me, and a serious builder community: https://skool.com/agentic-labs =========================== Tools I Use / Support the Channel =========================== 🚀 Hostinger VPS — use code LEON for 10% off: https://hostinger.com/leon 🚀 Start building with n8n — use my link to support the channel ❤️: https://n8n.partnerlinks.io/f7f19w3vrhin =========================== Subscribe / Connect =========================== Subscribe for practical AI building, agentic coding, automation, and real app builds: https://youtube.com/@leonvanzyl?sub_confirmation=1 Follow me on X: https://x.com/leonvz Business & sponsorship enquiries: leon@cognaitiv.ai =========================== Question =========================== What are you building with Claude Fable 5 right now? Let me know in the comments. ⏱️ Chapters 0:00 Fable 5 and the Mythos Models 0:39 The Ray Tracing Game Challenge 1:14 Selecting Fable 5 in Claude Code 1:35 Setting the Reasoning Effort 2:15 Planning Mode and Grilling Requirements 2:32 Fable 5 Pricing 3:12 Why Fable 5 Is So Slow 3:29 The RAMP Framework and Feature Files 4:01 Free Course and Plan to Feature 5:20 Implementing Features on Autopilot 8:29 Token Usage and Credits 9:00 Running Mirror Forge in the Browser 10:38 Fable 5 vs GPT 5.5 11:19 Final Thoughts =========================== About This Video =========================== In this video, I show you how to run Claude Fable 5 through a complete agentic coding workflow using Claude Code, from selecting the model and reasoning effort to planning, breaking the build into feature files, and implementing a full browser based ray tracing game on autopilot. This tutorial is for developers, AI builders, and serious no-code/low-code builders who want practical workflows for building real apps, AI agents, automations, and coding systems. On this channel, I share practical AI engineering and agentic coding workflows using tools like Claude Code, OpenCode, Codex, Cursor, n8n, Next.js, MCP, local AI models, and modern AI development workflows. #fable5 #claudecode #agenticcoding
