diff --git a/src/main/services/team/TeamProvisioningService.ts b/src/main/services/team/TeamProvisioningService.ts
index 1293c686..cb13b9bb 100644
--- a/src/main/services/team/TeamProvisioningService.ts
+++ b/src/main/services/team/TeamProvisioningService.ts
@@ -4453,10 +4453,13 @@ export class TeamProvisioningService {
   ): Promise<Record<string, string>> {
     const resolvedPrimaryProviderId = resolveTeamProviderId(primaryProviderId);
     const needsCodexTurnSettledEnv = memberSpecs.some((member) => {
-      const memberProviderId = resolveTeamProviderId(
-        normalizeTeamMemberProviderId(member.providerId) ?? resolvedPrimaryProviderId
+      const configuredProviderId = normalizeTeamMemberProviderId(member.providerId);
+      const inferredProviderId = inferTeamProviderIdFromModel(member.model);
+      return (
+        resolvedPrimaryProviderId === 'codex' ||
+        configuredProviderId === 'codex' ||
+        inferredProviderId === 'codex'
       );
-      return memberProviderId === 'codex';
     });
 
     if (!needsCodexTurnSettledEnv) {
diff --git a/test/main/services/team/TeamProvisioningServicePrepare.test.ts b/test/main/services/team/TeamProvisioningServicePrepare.test.ts
index 3631dfae..82ef140b 100644
--- a/test/main/services/team/TeamProvisioningServicePrepare.test.ts
+++ b/test/main/services/team/TeamProvisioningServicePrepare.test.ts
@@ -1988,6 +1988,24 @@ describe('TeamProvisioningService prepare/auth behavior', () => {
     });
   });
 
+  it('adds Codex turn-settled env when a secondary member infers Codex from model', async () => {
+    const svc = new TeamProvisioningService();
+    svc.setRuntimeTurnSettledEnvironmentProvider(async ({ provider }) =>
+      provider === 'codex'
+        ? { AGENT_TEAMS_RUNTIME_TURN_SETTLED_SPOOL_ROOT: '/tmp/runtime-hooks' }
+        : null
+    );
+
+    const result = await (svc as any).buildRuntimeTurnSettledEnvironmentForMembers('anthropic', [
+      { name: 'alice', providerId: 'anthropic' },
+      { name: 'jack', model: 'gpt-5.4' },
+    ]);
+
+    expect(result).toEqual({
+      AGENT_TEAMS_RUNTIME_TURN_SETTLED_SPOOL_ROOT: '/tmp/runtime-hooks',
+    });
+  });
+
   it('does not add Codex turn-settled env when no member uses Codex', async () => {
     const svc = new TeamProvisioningService();
     const provider = vi.fn(async () => ({