AI Tools and Comparisons
ChatGPT Is a “Tool for Thinking”—From “People Who Use AI” to “People Who Think with AI”
Introduction: From “Using” AI to “Thinking” with AI
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AI Tools and Comparisons
ChatGPT Personalization Guide for Beginners: Base Style, Tone, Characteristics, Custom Instructions, and Memory
Learn how ChatGPT personality, characteristics, custom instructions, and memory differ, with simple setups for beginners.
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AI Tools and Comparisons
ChatGPT Prompt Collection | Ready-to-Use Practical Examples and Tips for Creating Prompts That Are Less Likely to Fail
A collection of prompts ready to use with ChatGPT, organized by purpose—including writing, research, learning, and boosting work efficiency. Based on official information, we provide easy-to-understand explanations of how to write prompts that are less likely to fail, as well as how to manage them.
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AI Tools and Comparisons
ChatGPT Work vs. Chat and Codex: Scope, Permissions, and Review
Use OpenAI's current role distinctions for Chat, Work, and Codex, then define sources, prohibited actions, validation, and approval points.
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AI Tools and Comparisons
ChatGPT: Summary of the Latest Information, November 2025
A summary of the advancements and new features of ChatGPT/GPT-5.1 as of November 2025. For anyone considering how to use AI in their work, creative projects, and shopping.
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AI Tools and Comparisons
Choosing GPT-5.6 Sol, Terra, or Luna: API costs and ChatGPT access
Compare GPT-5.6 Sol, Terra, and Luna with a fixed extraction task and an API cost example. Check ChatGPT and Codex access separately from API pricing.
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AI Tools and Comparisons
Choosing Instant, Auto, or Thinking With a Current Task-Routing Matrix
Replace the retired GPT-5 Fast, Auto, and Thinking table with a routing matrix based on constraints, verification, time, and failure impact.
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AI Development and Automation
Codex Skills Explained: SKILL.md, Invocation, and Scope
A current guide to building and invoking a Codex Skill as a reusable workflow—not as a model or permission switch.
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AI Tools and Comparisons
Codex task boundaries: distinguish capability, access, and verified completion
Distinguish what Codex can do, what it can access, and what it has verified. Match code changes, tests, and deployment claims to observable evidence.
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AI Development and Automation
Comparison of Codex 5.2 and Codex 5.1 Max: The Best Choice for Long-Running Tasks and Large-Scale Refactoring
This article compares Codex 5.2 and Codex 5.1 Max in terms of long-running tasks, large-scale refactoring, Windows compatibility, and security. It helps you choose the version that best fits your development workflow.
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AI Tools and Comparisons
Deep Research and Agent Mode: A Comprehensive Guide to Features, Use Cases, and Differences
ChatGPT offers two advanced modes: **Deep Research**, which specializes in multi-step research, and **Agent Mode**, which handles everything from research to ac
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AI Tools and Comparisons
Develop Your Ability to Think Alongside AI: 3 Steps to Sort Through Your Doubts Using GPT-5’s Thinking Mode
Introduction: AI Is a Mirror That Reflects Our “Thinking Skills”
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