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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Claude Code/2026-04-08Intermediate

Fix Claude Code Bash Tool Execution Errors — Timeouts, Permission Denied, and Truncated Output

Learn how to troubleshoot and fix Claude Code Bash tool errors including timeouts, Permission Denied, ENOENT, truncated output, and environment variable issues with step-by-step solutions.

API & SDK/2026-04-07Intermediate

How to Fix Claude API 429, 503 Errors and Timeouts: A Complete Troubleshooting Guide

Struggling with Claude API 429 rate limit errors, 503 service unavailable responses, or timeout failures? This guide covers root causes and step-by-step fixes including exponential backoff, concurrency control, and Tier upgrades.

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 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.