meta/muse-spark-1.2-contributor is free to use.opencode's free tier also has meta/muse-spark-1.2-contributor, but that model's server is flaky, so I use hy-3 as my subagent model most of the time.
Also, the opencode free models on 9router don't auto-show in pi. You can only nest the oc free model via the composite form, and that combo caps at 128K context unless you hand-write the config.
So I built a pi extension: set /9router with your address and key, and it auto-detects every model on 9router, including the oc free ones.
pi install npm:@haoyiyin/9router
