however the legal terms are different, openai reads your data. they store it for 30 days, but of course once it hits the disk you can keep as long as you like in a civil case like nyt v openai.
the same for google and anthropic. so, it's not always nice if someone is paid to read your data for safety. people upload sensitive matters, personal videos and so on.
i wouldn't prioritise it myself but you can also know that the data will all come out in discovery if you are in a legal issue. maybe that's not important, but people thought it did matter to give some protections to patient records, legal advice and therapy. you upload that to gpt and it goes into discovery.
with open models you can get a subscription with privacy, at the same cost as codex.
openai, google and anthropic subscriptions are not available with privacy.
looking at the link there it's interesting that going from cursor cli to codex cli take gpt 5.5 from 7th to 3rd. but they didn't do open model in codex.
so, hard to say it's for sure a model benchmark. maybe open models are just shit at swe agent harness...it's not the most parsimonious explanation though.
it was so bugged, the mcp page broke its postgres, many openai compatible type generic providers but not knowing what works. discovered logging was truncated by default, too late. my fault for that last one.