Claude Fable 5 pushes long-horizon coding

Fable 5’s real breakthrough is sustained autonomy, but its premium pricing and heavy token usage make workflow efficiency as important as raw intelligence.

• –Designed to plan across stages, delegate to sub-agents, test its own work, and recover from blockers
• –Strong fit for large migrations, complex implementations, repository-scale coding, and document-heavy knowledge work
• –Vision capabilities let coding agents compare outputs against screenshots, diagrams, and design targets
• –At $10 per million input tokens and $50 per million output tokens, careless agent loops can become expensive quickly
• –Safety classifiers may decline high-risk requests or trigger fallback behavior, an important integration consideration