Claude engineering, Codex and GPT guides

This is not one of the Anthropic blogs — it reads them. Each post here takes something from the Claude blogs (the Anthropic engineering blog, product announcements, the Claude Code blog and changelog) and explains what it changes for teams who build on the API: new models and prices, agent patterns, a Claude Code skill worth installing, an outage worth knowing about. Blog posts are written by the gateway team; Anthropic is quoted, never impersonated.

Engineering deep dives for developers building on Claude — the Claude API, Claude Code workflows, Opus, Sonnet & Haiku routing, MCP, and reliable agents.

Latest posts

Codex API Key vs ChatGPT Subscription: Which Access Do You Need?
Dev Guides

Codex API Key vs ChatGPT Subscription: Which Access Do You Need?

Understand Codex API-key access, ChatGPT sign-in and gateway billing. Choose a route, verify the provider and avoid buying the wrong access.

Oct 11, 2026
GPT-6 Astra, Sol or Luna for Codex? A Practical Comparison
Dev Guides

GPT-6 Astra, Sol or Luna for Codex? A Practical Comparison

Choose a GPT-6 model for coding using task difficulty, completion quality and observed cost. Compare Astra, GPT-6.1 Sol, Luna and existing Sol integrations.

Oct 11, 2026
Claude Code Features Roundup: TypeScript Mods, Draft Recovery and Plugin Hooks (October 2026)
News

Claude Code Features Roundup: TypeScript Mods, Draft Recovery and Plugin Hooks (October 2026)

Explore claude code features for October 2026: TypeScript mods, prompt draft recovery, review controls, plugin hooks, and practical upgrade checks.
ClaudeCodingTools
Oct 4, 2026
OpenAI DevDay 2026: What Changed for Codex, GPT-6 Astra Ultrafast and Developers
News

OpenAI DevDay 2026: What Changed for Codex, GPT-6 Astra Ultrafast and Developers

Explore codex devday updates for Codex Cloud, CLI 0.160.0, code review and GPT-6 Astra Ultrafast, with API setup and plan details as of October 2.
GptCodingAgents
Oct 2, 2026
GPT-6.1 Sol: Cheaper Cached Input, What Changed From GPT-6 Sol and How It Fits Codex
News

GPT-6.1 Sol: Cheaper Cached Input, What Changed From GPT-6 Sol and How It Fits Codex

Explore gpt-6.1 sol pricing, cheaper cached input, benchmark changes from GPT-6 Sol, and Codex defaults and availability as of September 30, 2026.
GptModelsApi
Sep 30, 2026
Claude Sonnet 5.5 Launches: Pricing, What's New and Haiku 5.5 on the Way
News

Claude Sonnet 5.5 Launches: Pricing, What's New and Haiku 5.5 on the Way

Explore claude sonnet 5.5 pricing, benchmark gains, API migration changes and context limits, plus what is known about the upcoming Haiku 5.5 release.
ClaudeModelsApi
Sep 29, 2026
Claude Code Auto Mode vs --dangerously-skip-permissions: Letting Claude Work Without Asking
Dev Guides

Claude Code Auto Mode vs --dangerously-skip-permissions: Letting Claude Work Without Asking

Compare claude dangerously-skip-permissions with auto mode, understand permission modes and billing, and configure safer unattended Claude Code workflows.
ClaudeCodingSecurity
Sep 27, 2026
Claude Code Cloud Sessions Are Generally Available: Remote Control and Web Sessions Explained
News

Claude Code Cloud Sessions Are Generally Available: Remote Control and Web Sessions Explained

Learn how claude code remote control differs from cloud sessions, which plans include web access, and how to connect, hand off work, and debug sessions.
ClaudeCodingTools
Sep 25, 2026
Claude Opus 5.5 Is Out: Lower Prices, Higher Limits and What Changes for Claude Code
News

Claude Opus 5.5 Is Out: Lower Prices, Higher Limits and What Changes for Claude Code

Claude Opus 5.5 brings lower token prices and higher limits. Learn what changes in Claude Code, API migration, thinking, caching and long-session costs.
ClaudeModelsCoding
Sep 23, 2026
Claude Code Projects Beta: Agent Teams That Plan and Coordinate Parallel Work
Agents

Claude Code Projects Beta: Agent Teams That Plan and Coordinate Parallel Work

Understand claude code agent teams, the Projects beta, parallel cloud threads, shared memory, access requirements, and usage limits as of September 21.
ClaudeAgentsCoding
Sep 21, 2026
Claude Code Now Reads AGENTS.md: CLAUDE.md vs AGENTS.md and the .claude Directory
Dev Guides

Claude Code Now Reads AGENTS.md: CLAUDE.md vs AGENTS.md and the .claude Directory

Understand what is claude.md, how Claude Code 2.1.277 reads AGENTS.md, and how to organize project instructions and files in the .claude directory.
ClaudeCodingAgents
Sep 19, 2026
Claude Code Router: Run Claude Code on Other Models (and When a Gateway Is Simpler)
Open Source

Claude Code Router: Run Claude Code on Other Models (and When a Gateway Is Simpler)

Learn how claude code router connects Claude Code to other models, configure providers and fallbacks, and decide when a hosted gateway is simpler.
ClaudeCodingOpen Source
Sep 17, 2026
Claude Pro and Max Limits After the Permanent 25% Claude Code Increase
News

Claude Pro and Max Limits After the Permanent 25% Claude Code Increase

Understand claude pro limits after the permanent 25% Claude Code weekly increase, how Max limits work, and when extra usage makes sense for developers.
ClaudeCodingApi
Sep 16, 2026
CLAUDE_CODE_MAX_OUTPUT_TOKENS Explained: Output Limits and Plugin Folders in Claude Code 2.1.265
Dev Guides

CLAUDE_CODE_MAX_OUTPUT_TOKENS Explained: Output Limits and Plugin Folders in Claude Code 2.1.265

Understand claude_code_max_output_tokens in Claude Code 2.1.265, including verified model limits, plugin folder loading, and the 1 GB tool-data cap.
ClaudeCodingApi
Sep 10, 2026
Claude Code Review Workflow: The New Fullscreen Diff Panel in 2.1.260
Tools

Claude Code Review Workflow: The New Fullscreen Diff Panel in 2.1.260

Learn the claude code review workflow in 2.1.260: use the fullscreen diff panel, inspect changes, set review effort, and understand permissions and rewind.
ClaudeCodingTools
Sep 7, 2026
GPT-6 Astra: Launch Details, Pricing, Codex Computer Use and How It Compares With Claude Opus
News

GPT-6 Astra: Launch Details, Pricing, Codex Computer Use and How It Compares With Claude Opus

Explore gpt-6 astra launch details, API pricing, Codex computer use, migration requirements, and comparisons with Claude Opus 5 as of September 5, 2026.
GptModelsApi
Sep 5, 2026
Claude Fable 5.1: What Changed From Fable 5, Pricing, Cache Reads and API Breaking Changes
News

Claude Fable 5.1: What Changed From Fable 5, Pricing, Cache Reads and API Breaking Changes

Explore claude fable 5.1 changes from Fable 5, API pricing, cheaper cache reads, forced tool errors, thinking compatibility, and launch availability.
ClaudeModelsApi
Sep 2, 2026
Everything Claude Code (ECC): What It Is, What 2.2.0 Changed, and How to Install It
Open Source

Everything Claude Code (ECC): What It Is, What 2.2.0 Changed, and How to Install It

Learn what everything-claude-code adds, what ECC 2.2.0 changed, and how to install it in Claude Code, Codex, and Kimi with the right setup choices.
ClaudeCodingOpen Source
Aug 31, 2026
How to Change the Default Model in Claude Code (and the New Model-Switch Hooks in 2.1.251)
Dev Guides

How to Change the Default Model in Claude Code (and the New Model-Switch Hooks in 2.1.251)

Learn how to change your claude code default model, use /model for one session, and understand model-switch hooks and cache diagnostics in 2.1.251.
ClaudeCodingModels
Aug 29, 2026
Claude in Chrome Is Generally Available: What the Extension Does and How It Works With Cowork
News

Claude in Chrome Is Generally Available: What the Extension Does and How It Works With Cowork

Learn how the claude for chrome extension works, who can use it, how it connects to Cowork, and what browser permissions mean at general availability.
ClaudeAgentsTools
Aug 27, 2026
Claude Code Plan Mode: How to Use It and When It Saves Time and Tokens
Dev Guides

Claude Code Plan Mode: How to Use It and When It Saves Time and Tokens

Learn how to use claude code plan mode, review plans before edits, choose permission settings, and reduce wasted work without assuming token savings.
ClaudeCodingAgents
Aug 14, 2026
Claude Code Sessions: Self-Hosted Environments and Session Messaging in 2.1.224
News

Claude Code Sessions: Self-Hosted Environments and Session Messaging in 2.1.224

Learn how claude code sessions work in 2.1.224, including resume commands, self-hosted environments, cross-session messaging, and permission controls.
ClaudeCodingTools
Aug 9, 2026
CC Switch for Claude Code: Managing Accounts, Providers, and Configs
Tools

CC Switch for Claude Code: Managing Accounts, Providers, and Configs

Manage Claude Code accounts, API providers, and configurations efficiently with CC Switch for faster, safer development workflows.
CodingClaudeAPI
Jul 22, 2026
Graphify for Claude Code: Turning Your Repository Into a Queryable Graph
Tools

Graphify for Claude Code: Turning Your Repository Into a Queryable Graph

Turn your repository into a queryable graph with Graphify for Claude Code, enabling faster code understanding, navigation, and ana
CodingClaude
Jul 20, 2026
Claude Code’s Misfeatures: What Its Agentic Workflow Gets Wrong
Engineering

Claude Code’s Misfeatures: What Its Agentic Workflow Gets Wrong

A critical look at Claude Code’s agentic workflow, its design missteps, and where AI-assisted software development needs improveme
CodingClaudeAgents
Jul 19, 2026
Claude Code MCP Servers: Setup, Configuration, and Security
Tools

Claude Code MCP Servers: Setup, Configuration, and Security

Set up and configure MCP servers in Claude Code with practical examples, permissions guidance, and security best practices.
CodingClaudeMCPSecurity
Jul 18, 2026
Claude Can Use 1Password Credentials: What Developers Need to Know
News

Claude Can Use 1Password Credentials: What Developers Need to Know

Learn how Claude uses 1Password credentials, the security implications, risks, and safeguards developers should understand.
ClaudeMCPSecurity
Jul 17, 2026
Claude Prompt Injection: How Data Exfiltration Attacks Actually Work
Engineering

Claude Prompt Injection: How Data Exfiltration Attacks Actually Work

See how Claude prompt injection enables data exfiltration, how attacks unfold, and which defenses reduce risk.
ClaudePromptsSecurity
Jul 16, 2026
gstack for Claude Code: What Its 23-Agent Workflow Actually Does
Tools

gstack for Claude Code: What Its 23-Agent Workflow Actually Does

Explore how gstack orchestrates 23 specialized agents in Claude Code, from planning and implementation to review, testing, and del
CodingClaudeAgentsModels
Jul 15, 2026
Why Claude Code Sends 33k Tokens Before Your Prompt (And What to Do)
Engineering

Why Claude Code Sends 33k Tokens Before Your Prompt (And What to Do)

Discover why Claude Code sends 33k tokens of system context before your prompt and learn practical strategies to optimize token us
CodingClaudePromptsAPI
Jul 13, 2026
Claude Opus 4.8 Fast vs Standard: When to Pay for Speed
Engineering

Claude Opus 4.8 Fast vs Standard: When to Pay for Speed

Compare Claude Opus 4.8 Fast vs Standard modes. Learn when speed is worth the cost, performance tradeoffs, and how to choose the r
ClaudeModels
Jul 12, 2026
Anthropic's Content Classifiers: Why They're Too Strict for Creative AI
API

Anthropic's Content Classifiers: Why They're Too Strict for Creative AI

Exploring why Anthropic's content classifiers limit creative AI potential and how stricter filters impact writers, artists, and st
ClaudeAPI
Jul 11, 2026
Persistent Memory for Claude Code: How Cross-Session Context Actually Works
Engineering

Persistent Memory for Claude Code: How Cross-Session Context Actually Works

Learn how persistent memory enables Claude Code to retain context across sessions, improving workflow continuity and long-term pro
CodingClaude
Jul 11, 2026
Claude Code System Prompt: Engineering Lessons for Agent Builders
Engineering

Claude Code System Prompt: Engineering Lessons for Agent Builders

Engineering lessons from Claude Code’s system prompt for building safer, more reliable AI coding agents.
CodingClaudePromptsAgents
Jul 6, 2026
Alibaba Reportedly Bans Claude Code Over Security Concerns
News

Alibaba Reportedly Bans Claude Code Over Security Concerns

Alibaba reportedly bans Claude Code over security concerns, highlighting enterprise AI risk, data protection, and developer tool g
CodingClaudeSecurity
Jul 5, 2026
Claude Code vs Goose: Cost, Control, and Developer Workflow
Tools

Claude Code vs Goose: Cost, Control, and Developer Workflow

Compare Claude Code and Goose on cost, control, setup, and day-to-day developer workflow to choose the right AI coding tool.
CodingClaudeAgentsModels
Jul 4, 2026
Anthropic Cowork: Claude Desktop’s File-Editing Agent Explained
Agents

Anthropic Cowork: Claude Desktop’s File-Editing Agent Explained

Learn how Anthropic Cowork turns Claude Desktop into a file-editing agent for local projects, workflows, and developer tasks.
ClaudeAgents
Jul 3, 2026
Claude Fable 5 available globally tomorrow
News

Claude Fable 5 available globally tomorrow

Claude Fable 5 launches globally tomorrow with faster reasoning, broader access, and new tools for teams and creators.
ClaudeModels
Jul 2, 2026
Claude Sonnet 5 Reviewed: A Technical Breakdown for Builders (2026)
News

Claude Sonnet 5 Reviewed: A Technical Breakdown for Builders (2026)

Technical review of Claude Sonnet 5 for builders, covering coding performance, architecture tradeoffs, tool use, and deployment fi
ClaudeAgentsEngineeringModels
Jul 2, 2026
Mistral Small 2603: Architecture, Capabilities & What Engineers Should Know (2026)
News

Mistral Small 2603: Architecture, Capabilities & What Engineers Should Know (2026)

A concise engineering guide to Mistral Small 2603 architecture, capabilities, deployment tradeoffs, and practical 2026 use cases.
InferenceOpen SourceEngineeringModels
Jun 30, 2026
Grok 4.20 Reviewed: A Technical Breakdown for Builders (2026)
News

Grok 4.20 Reviewed: A Technical Breakdown for Builders (2026)

Technical review of Grok 4.20 for builders, covering architecture, capabilities, limits, benchmarks, and practical use cases.
EngineeringModels
Jun 29, 2026
Grok 4.20 Multi Agent Deep Dive: Where the New Model Fits in the 2026 Landscape
News

Grok 4.20 Multi Agent Deep Dive: Where the New Model Fits in the 2026 Landscape

Deep dive into Grok 4.20 Multi Agent, its architecture, strengths, limits, and role in the 2026 AI model landscape.
AgentsEngineeringModels
Jun 29, 2026
Hands-On with Claude Opus 4.7: Strengths, Context Window & Real Use Cases
News

Hands-On with Claude Opus 4.7: Strengths, Context Window & Real Use Cases

Hands-on review of Claude Opus 4.7: key strengths, context window limits, workflows, and practical AI use cases.
ClaudePromptsModelsAPI
Jun 28, 2026
DeepSeek V4 Flash: Architecture, Capabilities & What Engineers Should Know (2026)
News

DeepSeek V4 Flash: Architecture, Capabilities & What Engineers Should Know (2026)

Explore DeepSeek V4 Flash architecture, capabilities, performance tradeoffs, and key engineering considerations for 2026.
InferenceOpen SourceEngineeringModels
Jun 28, 2026
DeepSeek V4 Pro Reviewed: A Technical Breakdown for Builders (2026)
News

DeepSeek V4 Pro Reviewed: A Technical Breakdown for Builders (2026)

Technical review of DeepSeek V4 Pro for builders, covering architecture, performance, tooling, costs, and deployment tradeoffs.
Open SourceEngineeringModels
Jun 27, 2026
GPT 5.5 Reviewed: A Technical Breakdown for Builders (2026)
News

GPT 5.5 Reviewed: A Technical Breakdown for Builders (2026)

A builder-focused technical review of GPT 5.5 covering architecture, performance, tooling, limits, and practical integration guida
GPTEngineeringToolsModels
Jun 27, 2026
GPT 5.5 Pro: Architecture, Capabilities & What Engineers Should Know (2026)
News

GPT 5.5 Pro: Architecture, Capabilities & What Engineers Should Know (2026)

Explore GPT 5.5 Pro architecture, capabilities, limits, and practical guidance engineers need for building AI systems in 2026.
InferenceGPTAgentsEngineering
Jun 26, 2026
Qwen3.6 27B: Architecture, Capabilities & What Engineers Should Know (2026)
News

Qwen3.6 27B: Architecture, Capabilities & What Engineers Should Know (2026)

Explore Qwen3.6 27B architecture, capabilities, performance tradeoffs, and practical engineering considerations for 2026 AI system
InferenceOpen SourceEngineeringModels
Jun 26, 2026
Keeping Agent Loops From Burning Your API Budget
Agents

Keeping Agent Loops From Burning Your API Budget

Practical tactics to keep agent loops efficient, reduce wasted calls, and protect your API budget without slowing delivery.
AgentsEngineeringAPI
Jun 25, 2026
Hands-On with Qwen3.6 35B A3B: Strengths, Context Window & Real Use Cases
News

Hands-On with Qwen3.6 35B A3B: Strengths, Context Window & Real Use Cases

Hands-on review of Qwen3.6 35B A3B covering strengths, context window, performance, and practical AI use cases.
Open SourceModelsAPI
Jun 24, 2026
Model Context Protocol (MCP): A Developer Guide to the New Tool Standard
Tools

Model Context Protocol (MCP): A Developer Guide to the New Tool Standard

Learn how Model Context Protocol (MCP) standardizes AI tool integrations, servers, clients, and developer workflows for modern app
AgentsMCPModels
Jun 23, 2026
Handling Rate Limits and Retries on LLM APIs
API

Handling Rate Limits and Retries on LLM APIs

Practical strategies for handling LLM API rate limits with retries, backoff, jitter, and resilient error handling.
API
Jun 23, 2026
Qwen3.6 Flash Deep Dive: Where the New Model Fits in the 2026 Landscape
News

Qwen3.6 Flash Deep Dive: Where the New Model Fits in the 2026 Landscape

A concise deep dive on Qwen3.6 Flash, its strengths, tradeoffs, and role in the fast-evolving 2026 AI model landscape.
Open SourceModels
Jun 22, 2026
Streaming LLM Responses: Why It Matters for UX and Cost
API

Streaming LLM Responses: Why It Matters for UX and Cost

Learn how streaming LLM responses improve perceived speed, reduce wait times, enhance UX, and help manage AI product costs.
InferenceAPI
Jun 22, 2026
Choosing the Right Model for the Job (and the Budget)
API

Choosing the Right Model for the Job (and the Budget)

Learn how to match AI models to tasks, balance performance and cost, and choose the right option for your budget.
ModelsAPI
Jun 21, 2026
Mistral Medium 3 5: Architecture, Capabilities & What Engineers Should Know (2026)
News

Mistral Medium 3 5: Architecture, Capabilities & What Engineers Should Know (2026)

Explore Mistral Medium 3.5 architecture, capabilities, benchmarks, deployment tips, and key engineering tradeoffs for 2026.
Open SourceEngineeringModels
Jun 20, 2026
Engineering Lower Token Usage Without Hurting Quality
API

Engineering Lower Token Usage Without Hurting Quality

Practical engineering tactics to cut token usage while preserving output quality, reliability, and user experience in AI systems.
InferencePromptsModelsAPI
Jun 20, 2026
Claude Code and the New Wave of Terminal AI Coding Tools
Tools

Claude Code and the New Wave of Terminal AI Coding Tools

Explore how Claude Code and terminal AI coding tools are reshaping developer workflows, automation, and pair programming in the CL
CodingClaudeAgents
Jun 19, 2026
Grok 4.3 Reviewed: A Technical Breakdown for Builders (2026)
News

Grok 4.3 Reviewed: A Technical Breakdown for Builders (2026)

A builder-focused technical review of Grok 4.3 covering architecture, performance, tooling, limits, and practical use cases.
EngineeringModels
Jun 18, 2026
OpenRouter vs Going Direct: Picking How You Call LLMs
API

OpenRouter vs Going Direct: Picking How You Call LLMs

Compare OpenRouter vs direct LLM APIs on cost, reliability, routing, privacy, and control to choose the best integration path.
ModelsAPI
Jun 18, 2026
Claude Opus 4.8: Architecture, Capabilities & What Engineers Should Know (2026)
News

Claude Opus 4.8: Architecture, Capabilities & What Engineers Should Know (2026)

A concise engineering guide to Claude Opus 4.8 architecture, capabilities, tradeoffs, and practical adoption considerations.
ClaudePromptsAgentsEngineering
Jun 17, 2026
Prompt Caching, Explained: When It Saves Money and When It Does Not
API

Prompt Caching, Explained: When It Saves Money and When It Does Not

Learn how prompt caching cuts LLM costs, when cached tokens help, and where it won’t save money in real workflows.
InferencePromptsRAGAPI
Jun 17, 2026
How to Cut Your Claude API Bill: A Practical Token-Cost Guide
API

How to Cut Your Claude API Bill: A Practical Token-Cost Guide

Learn practical ways to reduce Claude API costs by cutting token usage, optimizing prompts, and managing outputs more efficiently.
ClaudePromptsAPI
Jun 16, 2026
Rustdesk: A Developer Deep Dive into the Trending AI Project (2026)
Open Source

Rustdesk: A Developer Deep Dive into the Trending AI Project (2026)

RustDesk deep dive for developers covering architecture, self-hosting, security, and modern remote access workflows.
Open SourceSecurityEngineering
Jun 15, 2026
Show HN: Ideogram 4.0 – open-weight 9.3B text-to-image model
News

Show HN: Ideogram 4.0 – open-weight 9.3B text-to-image model

Ideogram 4.0 debuts as an open-weight 9.3B text-to-image model focused on high-quality image generation and prompt fidelity.
Open SourceModels
Jun 15, 2026
Claude Fable 5 Deep Dive: Where the New Model Fits in the 2026 Landscape
News

Claude Fable 5 Deep Dive: Where the New Model Fits in the 2026 Landscape

Explore Claude Fable 5’s capabilities, tradeoffs, and role among leading AI models in the 2026 enterprise and developer landscape.
ClaudeModels
Jun 14, 2026
Lemonade by AMD: a fast and open source local LLM server using GPU ...
Engineering

Lemonade by AMD: a fast and open source local LLM server using GPU ...

Explore Lemonade by AMD, an open source local LLM server that uses GPU acceleration for fast, private AI inference on your machine
InferenceOpen Source
Jun 14, 2026
Ui: A Developer Deep Dive into the Trending AI Project (2026)
Open Source

Ui: A Developer Deep Dive into the Trending AI Project (2026)

Explore Ui, the trending AI project, with architecture insights, developer workflows, use cases, and 2026 adoption trends.
Open SourceEngineering
Jun 14, 2026
Getting Started with Claude API in 5 Minutes
Dev Guides

Getting Started with Claude API in 5 Minutes

From signup to first Claude API call in 5 minutes. Step-by-step guide with Python, TypeScript, and curl examples. Get a Claude Opu
ClaudeAPIEngineering
May 16, 2026
Hermes Agent Setup Guide: Use Claude API at 80% Off
Dev Guides

Hermes Agent Setup Guide: Use Claude API at 80% Off

Complete walkthrough for running the Hermes autonomous AI agent with AI Prime Tech Claude API gateway. Installation, base URL conf
ClaudeAgentsEngineering
May 16, 2026
OpenClaw + AI Prime Tech: Self-Hosted Agent on Discounted Claude API
Open Source

OpenClaw + AI Prime Tech: Self-Hosted Agent on Discounted Claude API

Use OpenClaw open-source AI agent framework with AI Prime Tech Claude API gateway for full local control plus 70-80% lower model c
ClaudeAgentsOpen Source
May 16, 2026

Codex and GPT API guides: Codex API key and access · OpenAI-compatible API · Codex CLI setup · GPT-6 model comparison