Interestingly, as someone who works in story generation and AI-assisted writing specifically measuring "quality" when it comes to generated writing samples, I've found Claude > Gemini > (most non-mainstream models) > OpenAI > Grok.
Also interestingly, this was almost certainly not written by Claude given the style.. and the human writer credits at the bottom.
There are a few claudisms e.g. "blast radius", "patterns", "This article shares what’s held up, what’s broken, and what we’ve learned about agent security along the way.", but it's certainly not wholesale claude output.