◉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 differs●PRICING — Per-token rates hold at $10/$50 per MTok. What changed is cache reads, cut 75% to $0.25 per MTok●COST — 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 number●BENCH — 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 real●SAFEGUARDS — Sharper cyber safeguards cut interventions in Claude Code sessions by roughly 60% on average. Finding vulnerabilities is now allowed; developing exploits still is not●API — 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●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 differs●PRICING — Per-token rates hold at $10/$50 per MTok. What changed is cache reads, cut 75% to $0.25 per MTok●COST — 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 number●BENCH — 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 real●SAFEGUARDS — Sharper cyber safeguards cut interventions in Claude Code sessions by roughly 60% on average. Finding vulnerabilities is now allowed; developing exploits still is not●API — 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/2026-08-19Intermediate

The listen Stream Kept Reopening Against My Serverless MCP Server

No errors anywhere, yet connections to the MCP server kept piling up overnight. Here is what happens when a fixed platform timeout meets a resubscribe loop, reproduced in a few dozen lines.

⬡ API & SDK/2026-08-15Intermediate

The Connection That Dies Mid-Thought Is Being Killed by Your Relay, Not the Upstream

Put a proxy or Worker in front of Claude Code and long thinking pauses start dying. The cause is neither the model nor the upstream — it is your relay holding the byte stream. Six relay behaviors compared side by side, plus how to verify yours before it ships.

⬡ API & SDK/2026-06-27Advanced

When Claude API Streaming Stops Without an Error: Detecting Silent Stalls and Resuming Mid-Stream

How to catch the 'silent stall' where Claude API streaming stops with no exception at all, using a content-level watchdog that times the gap between tokens, plus a resume path that carries received text forward as an assistant prefill, and a four-layer timeout budget for long-running automation.

⬡ API & SDK/2026-04-25Advanced

Claude API × Tauri 2: Building a Production Desktop AI App With Rust — Streaming, Tool Use, and Signed Distribution

A complete guide to shipping a production-grade desktop AI app with Tauri 2 and the Claude API: keychain-backed key storage, an SSE streaming bridge in Rust, Tool Use, and macOS/Windows signed distribution — with code you can copy.

⬡ API & SDK/2026-04-13Advanced

Building Enterprise AI Backends with Claude API and NestJS: Production

Integrating Claude API into NestJS with dependency injection, TypeORM persistence, SSE streaming, JWT auth, and Bull queues—including measured evidence of how a naive SSE client parser silently drops characters, and the fix.

⬡ API & SDK/2026-04-13Intermediate

Implementing Claude API SSE Streaming in Next.js App Router

Implement Server-Sent Events streaming from the Claude API in Next.js App Router — ReadableStream, a React hook, cross-chunk buffering, and the two silent failures that only show up in production.

⬡ API & SDK/2026-03-31Advanced

Claude API Streaming × Real-Time Chat UI: Production Implementation Guide

A practical guide to running Claude API streaming with Server-Sent Events in Next.js App Router at production grade, with measured latency, recovery patterns, and Cloudflare Workers edge-relay details from real indie operation

⬡ API & SDK/2026-03-09Intermediate

Implementing Streaming Responses — Real-time Responses with the Claude API

Implement streaming responses with the Claude API using working Python and TypeScript examples — SSE format, event handling, error recovery, and UI patterns, in the order I verified them.