"Agents on tasks" and "Exploration agents" run on Codex. Before, a Codex row without a model showed the catalog's default as selected while the agent started with no model at all, so Codex's own configuration decided. Now a row names a family (Sol, Astra, Terra, Luna; Sol is the preset), and every start passes the newest model of that family on the machine the agent runs on.
Agents and models
Before: versions shown (GPT-6.1-Sol), though the agent runs on whatever Codex's own settings name.After: families by name. This settings file still stored the old id "gpt-5.6-sol" for agents on tasks; it reads as Sol.
A card's model menu
Before: GPT-6.1-Sol checked; picking it saved nothing for the card.After: the same families as in "Agents and models".
Starting a Codex agent
With Sol chosen, the agent starts on GPT-6.1-Sol, the newest Sol this machine's Codex lists; the conversation heading shows the version that runs.A Codex too old to list its models: the agent does not start, and the card says Codex needs updating.
