# W5 | openai/gpt-5.4-mini | run 1

## Prompt

Write an apology email to a client. We missed the agreed delivery date by a week due to an internal mistake (not their fault); the client is frustrated. Be sincere, take responsibility, offer a concrete next step, don't grovel. Under 130 words.

## Response

We missed the agreed delivery date by a week, and I’m sorry for the frustration this caused. This delay was due to an internal mistake on our side, and it was not your fault.

We take responsibility for the miss and are already addressing the issue to prevent it from happening again. I’d like to propose a clear next step: I will send you the updated deliverable by **[new date]** and confirm progress with you by **[check-in date/time]**.

I appreciate your patience, and I’m committed to making this right.

Best,  
[Your Name]

Would you like a more formal or more personal version?
