Claude API Blog: Tutorials, Pricing & Best Practices
Deep dives into Claude API — technical breakdowns, best practices, cost optimization tips, and real-world use cases. Written by developers, for developers.
Project Glasswing: Mythos finds 10,000+ vulnerabilities
Anthropic’s Project Glasswing update: Claude Mythos found 10,000+ severe bugs, including OpenBSD SACK and FreeBSD CVE-2026-4747.
Claude Code tips: 12 production practices that make it useful
Twelve production-tested Claude Code practices for hooks, slash commands, CLAUDE.md, parallel subagents, context compaction, cost control, and stable ClaudeAPI access.
Claude prompts: 10 copy-ready engineering templates
Ten production-tested Claude prompt templates for XML structure, few-shot, chain-of-thought, prefill, role prompts, output locks, safety boundaries, and ClaudeAPI calls.
Claude API PDF Document Q&A in Practice: The Complete Guide from Native Parsing to Page-Level Citations
Got a contract, annual report, or research paper running dozens of pages — how do you build Q&A on it with the Claude API? This post covers the complete engineering workflow from PDF upload, native visual parsing, page-level citations, prompt caching for reuse, to splitting documents over 100 pages, with ready-to-run code in Python, Node.js, and cURL.
Claude Files API: from upload and reuse to quota management
How Claude Files API reuses PDFs, images, CSVs, and code across requests, covering 500 MB / 100 GB quotas, Batch, MCP, Code Execution, and cleanup.
SpaceX IPO Filing Reveals Anthropic Pays $1.25 Billion Per Month for Compute — On Track for First Profitable Quarter in Q2
SpaceX filed its S-1 on May 20, revealing that Anthropic has signed a compute procurement contract worth $1.25 billion per month — approximately $45 billion over 3 years. Meanwhile, WSJ reports Anthropic projects Q2 revenue of $10.9 billion with compute costs dropping from 71% to 56% of revenue, approaching its first-ever quarterly operating profit. This post breaks down the numbers and what they mean for developers.
Anthropic Enterprise Adoption Surpasses OpenAI for the First Time: Ramp May Data Recap and the Developer Perspective
Ramp's May 2026 AI Index shows Anthropic's enterprise adoption rate hitting 34.4%, surpassing OpenAI's 32.3% for the first time. This post breaks down the real drivers behind a 4x growth in one year, the cross-validation from Menlo Ventures' 40% vs 27% data, and what it all means for Claude API developers.
Claude Memory Tool in Practice: The Complete Guide to Giving Your Agent Cross-Session Memory
Claude's memory tool is a client-side storage-driven persistent memory capability. With just 6 commands, it enables cross-session information retention — and paired with context editing, benchmarks show 84% token savings on long-running tasks. This post covers the underlying mechanism, a minimal working Python implementation, how it differs from RAG, security best practices, and how to access it via API.
Karpathy Joins Anthropic: OpenAI Co-Founder Moves to Claude as the AI Talent War Enters a New Phase
On May 19, 2026, Andrej Karpathy — OpenAI founding member, former Tesla AI lead, and the person who coined "vibe coding" — announced he's joining Anthropic to work on Claude pre-training and the autoresearch team. This post breaks down the timeline, his background, the strategic implications, and how developers can access the Claude API through claudeapi.com.
The Complete Guide to Agent Skills (Claude Code Edition): Build Your AI Agent Skill Library in 6 Steps
A complete hands-on walkthrough from installing your IDE to creating your first Agent Skill. Covers the full setup of Antigravity, Claude Code, and CC-Switch — with claudeapi.com as the API gateway to get everything running end to end.
Connect AutoClaw to claudeapi.com: Get Claude Opus 4.7 Running in Your Local Agent in 5 Minutes
A step-by-step guide to adding a custom Claude model in the AutoClaw desktop app, connecting through claudeapi.com's gateway via the native Anthropic protocol. Covers the Settings entry point, Add Custom Model form fields, Connectivity Test verification, model switching, and troubleshooting.
Claude API Streaming (SSE) in Practice: From Typewriter Effects to Complete Tool Use Workflows
Get Claude streaming responses working in Python, Node.js, and cURL — covering SSE event parsing, streaming Tool Use calls, reconnection on disconnect, frontend typewriter effects, and production-grade error handling, with complete runnable code and a pitfall checklist.