CLAUDE LABJP
MODEL — Claude Fable 5.1 and Claude Mythos 5.1 landed on September 1. They are the same underlying model; only the strength of the safeguards differsPRICING — Per-token rates hold at $10/$50 per MTok. What changed is cache reads, cut 75% to $0.25 per MTokCOST — How much that saves depends on your workload: roughly 25% for typical use, up to about 45% for context-heavy agentic work. Worth measuring your own split before quoting a numberBENCH — Terminal-Bench-Science 0.1 climbs from 24.7% on Fable 5 to 52.6%. Anthropic also states a standard error of 3.5-4.5 points, which is worth remembering before reading small gaps as realSAFEGUARDS — Sharper cyber safeguards cut interventions in Claude Code sessions by roughly 60% on average. Finding vulnerabilities is now allowed; developing exploits still is notAPI — New API accounts created from today can no longer edit prior context while preserving Claude's thinking transcript. It is an anti-distillation measure, and existing accounts are unaffected for nowMODEL — Claude Fable 5.1 and Claude Mythos 5.1 landed on September 1. They are the same underlying model; only the strength of the safeguards differsPRICING — Per-token rates hold at $10/$50 per MTok. What changed is cache reads, cut 75% to $0.25 per MTokCOST — How much that saves depends on your workload: roughly 25% for typical use, up to about 45% for context-heavy agentic work. Worth measuring your own split before quoting a numberBENCH — Terminal-Bench-Science 0.1 climbs from 24.7% on Fable 5 to 52.6%. Anthropic also states a standard error of 3.5-4.5 points, which is worth remembering before reading small gaps as realSAFEGUARDS — Sharper cyber safeguards cut interventions in Claude Code sessions by roughly 60% on average. Finding vulnerabilities is now allowed; developing exploits still is notAPI — New API accounts created from today can no longer edit prior context while preserving Claude's thinking transcript. It is an anti-distillation measure, and existing accounts are unaffected for now
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API & SDK/2026-04-06Beginner

Claude Pro/Max Billing and Payment Errors: A Complete Troubleshooting Guide

Payment declined, subscription not showing up, or unexpected charges on your Claude account? This guide covers the most common billing issues and walks you through how to fix them step by step.

Claude Code/2026-04-04Beginner

Claude Code VS Code 'Not Responding — Try Stopping' — Isolating the Cause

Five step-by-step checks for the 'Not responding — try stopping' error in the Claude Code VS Code extension — root causes, Webview cache, Windows conflicts, and clean reinstalls.

Claude AI/2026-04-04Beginner

Claude Not Responding or Freezing — How to Tell the Cause Apart and Fix It

A diagnosis-first guide to Claude not responding or freezing. Learn to split the problem into browser-side and API-side, decide when to wait, reload, or fix your code — with timeout and retry examples included.

Claude AI/2026-03-30Beginner

Claude Not Responding, Slow, or Stopping: A Fix Guide

Learn how to diagnose and fix common issues when Claude won't respond, runs slowly, or stops generating mid-response.

Claude Code/2026-03-29Beginner

Claude Code Won't Start: Complete Diagnostic Checklist

Systematic guide for diagnosing Claude Code startup failures. Covers Node.js, npm, PATH, permissions, and proxy issues with step-by-step troubleshooting.

Claude Code/2026-03-29Beginner

Claude Code Not Working? Complete Troubleshooting Checklist — From Setup to Connection Issues

Getting started with Claude Code but nothing works? Commands fail, files aren't created, or you get connection errors. This beginner-friendly guide covers installation, configuration, common errors, and immediate fixes.

Claude Code/2026-03-26Beginner

Fixing ENOSPC Errors in Claude Code: A Hands-On Guide

ENOSPC errors in Claude Code and Cowork can stop your work cold. Drawing on the time I jammed my own four-site automation pipeline, here's how to find the cause, recover on the spot, and design so it never happens again.

Claude Code/2026-03-21Beginner

Claude Code Won't Start? Setup Troubleshooting FAQ

Claude Code CLI setup troubleshooting guide for beginners. Covers npm permission errors, API key issues, PATH configuration, proxy setup, CLAUDE.md loading, sub-agent startup, and git hook conflicts.