API key is likely invalid, expired, or missing permissions. Create a new key and verify the org/project binding in your provider console.
The Model ID doesn't match your provider. Copy it directly from the provider console instead of typing it.
Try a short test message first to see if it's a model issue.
Lower Temperature and retry in a new conversation.
Send three test messages:
If any fails, switch to a backup model to tell if it's a config issue or a version issue.
Still in development. Follow the official site and community for updates.