Open-source coding agents had a weird start to 2026.
In January, Anthropic suddenly blocked third-party tools from using Claude subscriptions. Overnight, with no warning.
OpenCode got hit the hardest. The team had to remove Claude login support after legal pressure. The commit message was literally just: “anthropic legal requests.”
PI never really cared. It was never built around one provider anyway.
And that kinda brings us to the obvious question. If you’re using your own API keys anyway, which open-source agent do you actually pick?
