Build for Android O (preview) - target api 26 not available

I’m using Unity 5.6.1f1 and already installed api 26 (android O) into my android-sdk folder, but the player settings won’t allow me to select it as the target api level, it allows me only to select up to level 25.

99905-unity-no-target-api-26.png

Is this because Unity doesn’t support api 26 yet? Is there a build of Unity available that does? In general for future cases, will building for android previews work in Unity?

I got reply from Unity team, For now choose “Automatic (highest installed)”.

https://forum.unity.com/threads/anyone-know-if-unity-supports-android-8-android-o-api-26-in-5-6-2.479756/#post-3265603

use Unity 5.6.6f2 for all your SDK updates.