Pretty sure that's against TOS.
replyEdit: it's not. https://github.blog/changelog/2026-01-16-github-copilot-now-...
They must be eating insane amounts of $$$ for this. I wouldn't expect it to last
No, Claude on GitHub Copilot is billed at 3X the usage rate of the other models e.g. GPT-5.4 and you get an extremely truncated context window.
replySee https://models.dev for a comparison against the normal "vanilla" API.