00:00 Seed S-opus45-xhigh-off
00:20 Settings > General > New threads > Model. Row: "GPT-6-Astra · Medium"
00:23 settings.json defaultModelSelection = {"instanceId":"claudeAgent","model":"claude-opus-4-5","options":[{"id":"effort","value":"xhigh"}]}
00:26 Open the effort picker (currently "Medium")
00:28 Choose Max
00:31 Picked Max. settings.json now {"instanceId":"codex","model":"gpt-6-astra","options":[{"id":"reasoningEffort","value":"max"},{"id":"serviceTier","value":"default"}]}
00:33 Reload the page
00:43 After reload. Row: "GPT-6-Astra · Max"
00:45 jq .defaultModelSelection settings.json -> {"instanceId":"codex","model":"gpt-6-astra","options":[{"id":"reasoningEffort","value":"max"},{"id":"serviceTier","value":"default"}]}