Claude Fable/Mythos Cost & Token Inspector

About

Stop losing money on Claude Fable 5 & Mythos 5 premium token rates, and stop guessing when your prompts trigger hidden safety downgrades!

Claude Fable/Mythos Cost & Token Inspector is the ultimate premium Chrome Side Panel companion built specifically for Anthropic’s new frontier models. Claude Fable 5 is exceptionally powerful, but at $10/M input and $50/M output tokens (2x more expensive than Opus), keeping an eye on your budget is critical.

Furthermore, Fable 5’s strict safety classifiers automatically reroute flagged queries to older models (like Opus 4.8) in over 5% of sessions without a clear warning. This extension gives you 100% transparency over what model is running, how much it costs, and how your prompts perform!

🚀 KEY FEATURES FOR FABLE & MYTHOS USERS:

- 💸 Real-Time Fable/Mythos Cost Estimator: Instantly tracks the exact dollar ($) spend per message based on the new $10/$50 per million token rates.
- 🛡️ Safety Rerouting & Downgrade Tracker: Automatically alerts you via on-page banners if Anthropic’s input classifiers silently reroute your prompt to a backup model due to safety false-positives.
- 📊 Context Burn Rate & Limits: View your active session's context consumption. Know exactly when your token memory is full before the browser tab crashes or lags.
- 🧠 Quality, Hedging & Refusal Analyzer: Fable 5 can sometimes give non-committal answers when approaching sensitive boundaries. Spot "beating-around-the-bush" (hedging) language instantly using our premium grading cards.
- 📝 Advanced Readability Scores: Computes Flesch Reading Ease & Flesch-Kincaid Grade levels instantly to verify if your AI-generated technical documentation or code commentary is up to enterprise standards.
- 📋 Premium Pro Templates (Rewriter Tab): Unlock an exclusive library of pre-optimized prompts specifically designed to bypass aggressive Fable 5 false-positive triggers safely for coding, business, and writing.
- 📋 Local History Logs: Keep an organized log of all your previous prompts, token burn rates, and total cost metrics.

👥 WHO IS IT FOR?

- Elite Software Engineers & Devs: Optimize complex, long-horizon multi-file coding sessions without draining your API or Team budget.
- Prompt Engineers & AI Researchers: Understand exactly how Anthropic's new middleware layers impact your workflow and test enterprise safety boundaries locally.
- Startups & Finance Managers: Calculate real-time AI ROI and prevent developer teams from racking up unexpected thousands in model bills.

🔒 PRIVACY & SECURITY FIRST:

This extension operates 100% locally on your machine. Your prompts, code injections, and token analytics are processed purely inside your browser environment (`chrome.storage.local`). We never collect, store, or transmit your data to external servers.

💎 UPGRADE TO PRO LIFETIME ACCESS:

Enjoy basic metrics for free, or unlock unrestricted access to the complete Fable/Mythos pricing tracker, safety alerts, and full rewriter suite with a One-Time $29 Lifetime Deal via Gumroad. No ongoing monthly fees!

Supercharge your Claude workflow and download the Inspector today!