Haha what, OpenAI has been in bed with them and their models used by them since before Anthropic was even a thing. Claude will just have been picked because they considered it the strongest at the task at that point in time.
It's crazy to see this kind of misinformation.
https://www.reuters.com/technology/palantir-faces-challenge-...
The pushback isn't that they use Anthropic, it is that you stated they used it "entirely", which is not true.
Yes Anthropic is a priority model in their ecosystem and they are deeply embedded with both tech and staff, but they are not the one as indicated and sourced in my reply above.
"Microsoft is powered entirely by OpenAI" because a single one of their things uses it. No it isn't.