Opus 5 Beats Fable 5 on Cost per Task and Tokens

Melvin Vivas · X post · 2026-07-25 · Open on X

Topics: LLM Fundamentals, LLMOps, Deployment & Monitoring · Level: intermediate

Summary

The creator points to a cost-per-task comparison showing Claude Opus 5 is cheaper and uses fewer tokens than Fable 5. He takes this as a reason to switch from Fable 5.

Key points

• Opus 5 has a lower cost per task than Fable 5.
• Opus 5 uses fewer tokens per task.
• Judge model cost by total cost per task, not price per token alone.

Resources mentioned

• Claude Opus 5.5 · tool · claude.ai · paid · open in a browser to verify · recommended by both Bashiri Smith & Melvin Vivas
  Anthropic's AI assistant, used throughout the guide to tailor resumes, add live roles to the tracker, match connections to target companies and find hiring managers.
  Also in: Generating a Repo Promo Video with a Claude Skill on Sonnet 5.5 vs Opus 5.5 (Melvin Vivas on X · notes), Comparing Coding Models on the Same Task in Devin iOS (Melvin Vivas on X · notes), Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes), AI Engineer Roadmap Overview: From ML Foundations to RAG, Agents & Ops (Bashiri Smith on Facebook · notes) and 53 more
• Fable 5 · tool · anthropic.com · paid
  A frontier model used as the comparison point in the Claude Opus 5 announcement; the post gives no other details about it.
  Also in: Claude Opus 5.5 in Devin: #1 on FrontierCode 1.1 (Melvin Vivas on X · notes), Creator's Top 3 Closed Models: Fable 5, GPT 5.6 Sol, Grok 4.6 (Melvin Vivas on X · notes), Opus 5 vs Fable 5: Cost per Task in Cursor Benchmarks (Melvin Vivas on X · notes), Claude Opus 5 Release: Anthropic's New Model Announced (Melvin Vivas on X · notes) and 7 more

Try this

• Look at cost-per-task comparisons before choosing a model.