MS Copilot is far behind compared to OpenAI ChatGPT

I typed this question: "My client received £52,000 from his late father's estate and £17,000 from his mother, who is alive in the 2025/26 tax year. He has self-employment income of £15,000 and rental income of £7000. He is a UK resident and under 65. Does he need to pay any tax on monies received from his dad's estate and gift from mother?" in Microsoft Copilot (Using Chat GPT 5) and got this answer three times over two days: "Something went wrong. Please try again later". However, OpenAI ChatGPT provided the correct answer within a few seconds. OpenAI ChatGPT's answer is the same as the answer given by TolleysAI. They both use ChatGPT, but the results are entirely different.

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