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GPT-5.6
Is Now in
Microsoft 365
Copilot
What changed, what didn't—and how
to test it properly.
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The Verified
Announcement
On 9 July 2026, OpenAI and Microsoft
confirmed that GPT-5.6 became the
preferred model across Microsoft 365
Copilot experiences.
Word - stronger drafting and refinement
with fewer prompting rounds
Excel - deeper analysis with more efficient
token use
PowerPoint - more polished presentations
with less manual direction
Copilot Chat - stronger reasoning for
complex requests
Cowork - better execution of complex,
cross-functional work
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What "Preferred Model"
Actually Means
Copilot uses a combination of models and smart routing to match the right
capability to the task.
Before
More manual prompting
More back-and-forth to get the structure, depth
and tone right.
Now
Stronger first response
Smarter reasoning, cleaner structure and more
useful output from fewer interactions.
i Copilot may still route work based on the application, task complexity, organisational settings and
licensing.
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The Practical Improvement
You Should Notice
GPT-5.6 raises the quality ceiling across Microsoft 365 Copilot, helping you move from idea to outcome faster.
Fewer Refinement Rounds
Better instruction following means less time re-asking, rephrasing and rebuilding.
Stronger Multi-Step Reasoning
Handles more complex requests, comparisons and synthesis with greater accuracy.
More Polished Work Products
Clearer structure, stronger analysis and outputs that need less manual fixing.
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Word: From Scattered Material
to a Decision-Ready
Document
GPT-5.6 helps turn multiple sources
into clearer, structured documents
faster.
Use your Microsoft 365 content
Project Brief.docx
Steering Meeting Notes.docx
Status Report - July.xlsx
Risk Register.xlsx
Generating document...
Outcome: A clear update with contradictions flagged-ready for review and approval.
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Excel: From Numbers
to an Audible
Conclusion
Go beyond charts. Ask Copilot to explain the
evidence behind the conclusion.
Variance analysis
Workstream
Technology
People
Vendors
Forecast
£1.25m
£950k
£700k
Actual
£1.53m
£1.10m
£640k
Variance
(£280k)
(£150k)
£60k
Analysing workbook...
Expected output
Editable table + variance drivers + recurring/
exceptional classification + evidence notes
Outcome: Evidence-backed insight with an editable table you can trust-and verify.
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PowerPoint: From Source
Material
to a Coherent Argument
Turn rough inputs into a presentation that tells
a clear story-faster.
Home Insert Design Review
investment Committee Update
A clearer case
for the recommended
option.
Generating deck...
What to judge
Argument quality + source fidelity +
template adherence + editability
Outcome: A polished, on-brand deck with a stronger narrative and less manual slide building.
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Copilot Chat: Compare,
Reconcile and
Recommend
Use stronger reasoning for complex
requests that span multiple sources.
Your sources
Market Analysis.docx
Competitor Review.pptx
Customer Feedback.xlsx
Q2 Sales Update.pdf
Microsoft 365 Copilot Chat
Compare the two market analyses and our latest
sales data. Summarise the key similarities,
differences and risks. What unresolved questions
must we answer before deciding?
Response structure
1. Areas of agreement
2. Conflicting evidence
3. Material risks
4. Unresolved questions
5. Recommendation
Thinking...
Outcome: A clear comparison with risks, gaps and the next best actions identified.
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Cowork: One
Objective,
Multiple Actions
GPT-5.6 in Cowork is designed for complex, cross-functional work
from start to finish.
Research
Find and review
relevant information
Analyse
Synthesize
and identify
insights
Create
Generate
documents,
sheets and
decks
Draft
Prepare
communications
and updates
Review
Request
approval
before
sensitive
actions
CONCEPTUAL COWORK TASK
Review the project plan, risk register, steering
minutes and stakeholder correspondence.
Create a recovery plan, draft the sponsor
briefing and prepare-but do not send-the
team update.
Approval gate
✓ Files prepared
✓ Email drafted
✓ Meeting proposed
▲ Awaiting user approval
Outcome: Work completed across tools-so you move from objective to deliverable with less manual
coordination.
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Access May Differ
What you see depends on several factors.
Microsoft 365 Plan
Business Standard, E3, E5 and Copilot add-on
Copilot Licence
Licensed users receive priority model
access and broader capabilities
Application & Platform
Web, desktop and mobile experiences can
vary
Administrator Settings
Your organisation controls model availability
Rollout Status
Features and model routing can roll out
gradually
With a Microsoft 365 Copilot licence
Priority model access
Full Work IQ grounding across meetings, email,
chats and files
Expanded agents and in-app functionality
Without the Copilot add-on
Standard model access
Limited work-data reasoning
Limited agent access
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The Governance Change
Behind the Announcement
OpenAI now operates as a Microsoft subprocessor for certain models.
Available since 9 July 2026 for eligible
commercial customers, unless disabled by an
administrator.
Administrators can allow, limit or disable
access for users and groups.
Not available in government or sovereign clouds
and excluded from applicable in-country
processing commitments.
Included in the EU Data Boundary, subject to
Microsoft's documented exceptions.
Microsoft 365 data, permissions, compliance
and post-processing controls still apply.
Copilot control settings
OpenAI-operated models
Choose how users in your organisation can access
OpenAI-operated models.
Allow for everyone
O Allow for selected users / groups
Disable for everyone
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A Better Model
Deserves a
Harder Test.
Give Copilot real sources, a clear
outcome and a review standard-not a
generic one-line prompt.
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Microsoft Copilot
workflows.
Real prompts. Real outcomes. Better
work.
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