So it used to be a lot of copy and pasting from one LLM into the other.
That got at least a little easier yesterday when OpenAI released a new Web Browser called Atlas that integrates ChatGPT into the browser. You open Claude in the browser and simply ask ChatGPT to comment within the Atlas browser.
So here is an example. I had Claude try to answer your question and to the right ChatGPT commented on Claudes answer (with some prompting from me):
There’s also a simpler hybrid approach that Claude didn’t mention: using ChatGPT’s Atlas interface (or any browser-based side-panel AI) to analyze another model’s answers directly.
It’s a one-way interaction — ChatGPT reads the other model’s reasoning, critiques it, and expands it in real time.
That gives you independence between models without needing APIs, coding, or multi-agent orchestration — a transparent and accessible form of cross-model verification.
Note that it would be easy to copy what ChatGPT said and paste it into Claude using this browser. Here is a screen shot of both LLMs trying to answer your question:
