No one told you the best AI model isn’t ChatGPT anymore.

So I asked Claude to prove it.

I won’t go through maths competition or coding puzzles.

This is about writing with AI (and this entire newsletter).

At the end, you will master:

• Why Claude Opus 4.5 beats ChatGPT-5.2.

• How do I write this blog (with Claude).

• The exact prompt to test it yourself.

1. Why Claude Opus 4.5 beats ChatGPT.

I’ve spent months trying to make ChatGPT write like me.

Custom instructions. Voice samples. Banned words. Examples of my best posts.

It got close. But never right.

Something always felt off. Too smooth. Too eager. The sentences flowed when they should have punched. It added filler where I would have stopped.

Then I tried Opus 4.5.

I gave it the same inputs. Same samples. Same constraints.

And it sounded like me.

Not “kind of like me.” Not “close enough.”

Actually me.

The short sentences. The fragments. The moments where I hold back instead of over-explain. The rhythm of starting with “And” or “But” when it feels right.

It caught what ChatGPT kept missing: taste.

ChatGPT mimics the surface. Word choice. Sentence length. Formatting.

Opus catches the deeper layer. When to be blunt. When to let a line breathe. When to cut the obvious transition.

This newsletter you’re reading?

I gave Opus my past posts and said “write like me.”

First draft. Almost no edits.

You don’t believe me? Follow up on the next section of this newsletter.

I recorded the whole video of me writing this newsletter.

That never happened with ChatGPT. Not once. I always had to rewrite half of it because it felt like someone doing an impression of me instead of me.

For anyone building a personal brand, writing content, running a newsletter: this is your time.

Claude gets your voice. Actually preserved.

Are you new? Access my archive: https://docs.google.com/document/d/1pWuMCBVQo1zKcgKltX_BZxAr31KgxmOlp3Vzvmc5Hxc/edit?usp=sharing.

2. How do I write this blog (with Claude).

Here’s the twist.

I didn’t write this newsletter.

Claude Opus 4.5 did.

Every section. The structure. The rhythm. This sentence.

I recorded the whole thing. You can watch it above.

Here’s what happened:

I opened Claude. I gave it my past newsletters as examples. I told it to write about itself, for my audience: business leaders who don’t code.

Then I asked for options. Three angles. I picked one.

I asked for structure. Six sections. I approved it.

Then I said: write section by section. After each one, I’ll tell you to continue or edit.

That’s it.

No magic prompt. No complicated system.

Just a conversation. Back and forth. Steering when needed.

The first section? I rewrote it myself. Felt too clever.

The second section? First draft was too shallow. I pushed back. “This isn’t good enough. Go deeper.” It did.

This section? Written by Claude. About Claude writing for me.

(I know. Very meta.)

The point isn’t that AI wrote my newsletter.

The point is: it wrote it in *my* voice. First try. With minimal editing.

That’s new.

3. The exact prompt to test it yourself.

Don’t take my word for it. Try it.

Here’s how I set it up: