Writing & chat · guidance updated 4 Oct 2026
Microsoft Copilot prompt guide
Runs OpenAI GPT-5.x models (GPT-5.6 is the Microsoft 365 Copilot default) behind Auto/Smart routing with Quick Response and Think Deeper modes; no model names exposed. Consumer and M365 apps merged August 2026.
How to prompt Microsoft Copilot
- Build the prompt from Microsoft's four ingredients: goal, context, expectations, source.
- Lead with a single clear goal; it is the one element Copilot strictly needs.
- Give generous detail: Copilot only sees the current conversation.
- Name the source to use (a specific email, file, meeting or website) when grounding matters.
- State expectations for tone, audience and format (e.g. 'a table', '5 bullets', 'executive summary').
- Put text to be rewritten or quoted inside quotation marks.
- Write in clean, grammatical, professional sentences.
- For complex reasoning or comparisons, tell the user to switch to Think Deeper.
- Ask it to cite web sources when facts must be current.
- Start a fresh chat (or type 'new topic') when switching tasks.
The shape of a good prompt
[Goal: what you want produced] [Context: why, for whom, relevant background] [Source: specific files, emails, sites or 'search the web'] [Expectations: format, length, tone]
Avoid
- One-word or keyword-only prompts
- Assuming it remembers earlier separate chats
- Leaving the source unspecified when you need grounded answers
- Mixing unrelated topics in one thread
Example
Request summarise this report for my boss
Goal: Summarise the attached quarterly sales report for my manager. Context: My manager has 2 minutes to read this before a leadership meeting and cares most about revenue against target, the biggest risks, and decisions needed. Source: Use only the attached report "Q3 Sales Review". Expectations: An executive summary of no more than 150 words, followed by 3 bullet points for risks and 2 bullet points for decisions needed. Professional, neutral tone. Flag any figures that look inconsistent.