The model menu lists only the models, newest of each family

The menu beside Start agent, where you pick the model a task runs on, no longer lists each harness's default as an entry of its own. It lists the models themselves, and of Codex's models only the newest version of each family, so older versions like GPT-5.6-Sol no longer crowd the list. Configuration → Agents and models offers the same list. When a group runs on Codex's default, the menu checks the model that default is.