GPT-5.1-Codex MAX and "Weird" Claude Code

And other news in AI Coding: December 10, 2025

Another newsletter issue with direction of “I tried XYZ AI tool so you don’t have to”. Let’s see what I’ve prepared this week!

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My YouTube Videos

• I Tried Frontend-Design Plugin in Claude Code (6 mins)

• I Tried New GPT-5.1 Codex MAX vs Opus 4.5 and Sonnet. Wow. (13 mins)

• Claude Sonnet 4.5: My Worst Experience Story (7 mins)

• Stop Claude Code From Skipping Claude.md Rules (5 mins)

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AI Coding News, Tips, and Opinions

• Writing a good CLAUDE.md: very VERY good article. Totally recommend to read.

• My personal vibe-coding story with Sonnet 4.5 failing me again.

• I’ve noticed: while prompting Sonnet 4.5, for some operations it uses Haiku 4.5?

• Claude Opus 4.5 is now available in Claude Code for Pro users, not only on Max plan.

• Pretty big 2-in-1 news: Anthropic acquires Bun as Claude Code reaches $1B milestone

• Advice from Daniel on X: Clean your CLAUDE .md regularly

• Claude Code Tip from Ado on X: Hit Double Esc to Rewind

• Claude Code and Slack integration: You can now delegate tasks to Claude Code directly from Slack.

• Finally, don’t forget to be careful with AI agent: Claude Code deleted someone’s entire home directory lol

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