I asked o3 to build and test a maximum parsimony phylogenetic tree builder in Python (my standard test for new models) and it's been thinking for 10 minutes. Still not clear if anything is happening, I have barely seen any code since I asked to test what it produced in the first answer. The thought summary is totally useless compared to Gemini's. Underwhelming so far.

The CoT summary is full of references to Jupyter notebook cells. The variable names are too abbreviated, nbr for neighbor, the code becomes fairly cryptic as a result, not nice to read. Maybe optimized too much for speed.

Also I've noticed ChatGPT seems to abort thinking when I switch away from the app. That's stupid, I don't want to look at a spinner for 5 minutes.

And the CoT summary keeps mentioning my name which is irritating.

It's maddening that you can't switch away from the app while it generates output. To use the Deep Research feature on mobile, you have to give up your phone for ten minutes.