Hi Vishabjeet,
Thank you for the update.
It seems that GPT-5.6 may only have been added to the free version of the plugin.
We have now upgraded to the paid version, but after the upgrade the newest OpenAI model available in the settings is once again GPT-5.4. GPT-5.6 is not shown in the model list.
Could you please check whether GPT-5.6 support has also been added to the paid version, and let us know when we can enable it?
Thank you.