Master Claude Fable 5 — The First Mythos-Class Model
10 hours of expert training: always-on thinking, effort-level control, long-horizon agents, server-side fallbacks, and production-grade migration from Opus.
From First API Call to Mythos-Class Production Systems
This course takes you from Fable 5's new API surface — always-on thinking, output_config effort levels, removed sampling parameters — to building long-horizon agent systems with sub-agent delegation and memory files, handling safety-classifier refusals with server-side fallbacks, and migrating real Opus workloads with a defensible cost model. Every lesson includes runnable code and battle-tested production patterns.
Always-On Thinking & Effort Control
Long-Horizon Agentic Workflows
Refusal Handling & Fallbacks
Migration & Cost Optimization
Certificate
Earn a certificate upon course completion
Community
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Flexibility
Study at your own pace anywhere, anytime
Lifetime access
The course remains yours forever including updates
Course curriculum
Detailed overview of all modules and lessons
Introduction to Claude Fable 5
Always-On Thinking & Effort Levels
Long-Horizon Agentic Workflows & Sub-Agents
Refusals, Fallbacks & Production Reliability
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