codex agent: So Powerful It’s Almost Dangerous, So Cheap It’s Almost Free

In the past few days, I’ve been completely absorbed in codex.

Daily token consumption ranges from at least 100 million to nearly 300 million.

In less than 7 days, I’ve used 1.3 billion tokens, which would cost about $1,100 if billed via API.

Of course, OpenAI built its trillion-dollar AI factory where token production costs are close to electricity bills, so they heavily subsidize it. A $200/month Pro subscription effectively lets you spend $5,000 worth of tokens per month.

What did I build?

macify Plugin

1. Added two new features to Achan’s Chrome extension macify. My first time merging code on GitHub!

2. Built a third-party website for macify: macify.candobear.com

AI Insider 2.0

3. Upgraded AI Insider to version 2.0: launched the site seriousai.candobear.com, which can be added as a PWA app on both mobile and desktop.

Added semantic search capabilities, seamlessly integrating AI into the AI Insider site. For example, searching for “财富密码” (wealth secrets):

Also rebuilt the entire insider workflow inside codex: faster, better, more powerful — and nearly free.

4. Insider MCP

AI Insider is now fully integrated into agents and chatbots, with new additions: Insider CLI, Insider MCP, Insider SKILL, and Insider AGENT.

You can use it in any chatbot or agent! And explore new features like topic research and cross-article reading.

wechat2readwise

5. wechat2readwise service: Yesterday I tackled a high-difficulty project — building a readwise inbox service within the WeChat ecosystem.

It involved WeChat service account development, WeCom (WeChat Work), WeChat Pay, Tencent Cloud, Cloudflare… but everything went smoothly, going from zero to a satisfying iteration in under 24 hours.

Try it: wechat2readwise.candobear.com

codex: So Powerful It’s Almost Dangerous

ChatGPT and the LLMs it represents are often called a “GPT” technology: General Purpose Technology. As the name suggests, master this technology and you can solve any problem.

The revolutionary new version of codex, updated on April 16, 2026, truly embodies the meaning of “GPT”: for (almost) everyone, for (almost) everything!

So powerful it’s almost dangerous.

So cheap it’s almost free.

That’s why I’ll spend 2 hours in a codex special session, sharing heavy practical experience — to talk with you about the codex agent!

Lecture Outline

Content is rich, but the structure follows the principle of Dao, Law, Technique, Tool, combined with real-world cases and hands-on practice.

Livestream Room

Scan the QR code to enter the livestream room.