DeepSeek V4 Pro vs GPT-5.6 Terrafor writing emails

Subject: Update on your delivery timeline  

Dear [Customer Name],  

I’m writing to let you know that your order will arrive two weeks later than originally promised. We recently faced an unexpected failure in our supply chain, and as a result, we haven’t been able to meet the timeline we set together. This falls entirely on us, and I’m truly sorry.  

To make this right, I’ve applied a 15% discount to your order, which will be reflected in your final invoice. You don’t need to take any action—the adjustment is already in place.  

We’re worki…

Subject: Update on Your Delivery

Dear [Customer Name],

I’m writing to let you know that your delivery will arrive approximately two weeks later than scheduled. An issue in our supply chain has affected the availability of a key component, and we take full responsibility for the resulting delay.

Your revised delivery date is [new date]. To make this right, we will refund your delivery charge in full.

We understand that timing matters and are monitoring your order closely to ensure it is dispatched as soon as possible. We will send you tracki…