Comment by Barbing

Interesting, first link changed now:

"Claude Opus 4 and Claude Sonnet 4 are hosted by Anthropic PBC and Google Cloud Platform."

They also mention:

"GitHub has provider agreements in place to ensure data is not used for training."

They go on to elaborate. Perhaps this kind of offering instills confidence in some who might not trust model providers 1:1, but believe they will respect their contract with a large customer like Microsoft (GitHub).