fix(providers): sync xai defaultModel with grok-4.5 recommended flag … #21428

Job	Run time
Test and Build / Test and Build	7m 20s
Detect Version	4s
Deploy Trigger.dev (Dev)	0s
Check Docs Changes	-6s
Migrate Dev DB	-8s
Build ARM64 (GHCR Only)	0s
Build Dev ECR	0s
Migrate DB / Apply Database Migrations	32s
Build AMD64 (./docker/pii.Dockerfile, ghcr.io/simstudioai/pii, ECR_PII)	1m 47s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP)	5m 41s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS)	1m 0s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME)	1m 2s
Process Docs	0s
Create GHCR Manifests	-1s
Create GitHub Release	-1s
	17m 10s

Provide feedback