Models
Start withholo3-1-35b-a3b. It is on the free tier, has native function calling, and its latency suits interactive loops. Move to holo3-122b-a10b for complex multi-step tasks and novel environments. Switching is a model ID change. IDs are stable: before a model is removed, its deprecation_date is set in GET /v1/models and a notice appears on this page, so pin an ID in production and check deprecation_date when you upgrade.