Reduce Copy-Pasting in Word. ChatGPT for Word is Here | AI Weekly Report for Office Workers in Their 40s #03

This week, many practical updates for AI tools were announced both domestically and internationally.

In particular, this week saw notable developments directly impacting daily work, such as "direct integration with office software you use every day" and "significant changes to paid plan specifications."

For busy office workers, there is no need to check every single piece of AI news.

In this article, I have carefully selected and organized the three most important points that will directly lead to "time savings at work" for office workers in their 40s. It takes about 5 minutes to read, and at the end of the article, I have included specific steps you can try immediately.

This Week's AI News: 3-Line Summary

• News 1 : An official add-in that allows you to use ChatGPT directly on the Microsoft Word screen has been released, and it is now available toall users, including those on the free plan .
• News 2 : Gemini for Google Workspace now connects directly with Salesforce and Asana, allowing you to check business data without switching tabs.
• News 3 : The "automatic thought switching" feature has been removed from ChatGPT Plus/Pro, and the operation has been changed to require manual model selection for deep analysis.

NEWS 1 | ChatGPT for Word Officially Released (Supports All Plans Including Free Plan)

What has changed?

On September 17, 2026, OpenAI released the official ChatGPT add-in for Microsoft Word.

This follows the addition of Word to the existing add-ins for Excel and PowerPoint.

You can now display ChatGPT in the Word sidebar to "draft documents from notes," "summarize long documents," "refine selected text," and "automatically adjust headings and layouts" directly.

It is available on all ChatGPT plans, including the Free plan, not just paid plans.

What does this have to do with office workers?

If you have been pasting text created in Word into the browser version of ChatGPT and then moving the results back to Word, you can now reduce this back-and-forth process.

With this update, you can simply provide instructions in the sidebar on the right while keeping Word open, and the revisions will be reflected directly in the document you are writing.

You can reduce the hassle of switching between your browser and Word when creating or refining reports, project proposals, and meeting minutes.

What should you do in the end?

If you use Word, try searching for "ChatGPT" in the Microsoft Marketplace.

Since the addition or use of add-ins may be restricted on company PCs depending on organizational settings, please try adding and using it only if it is permitted.

NEWS 2 | Gemini in Google Workspace now integrates directly with external tools (Salesforce, Asana, etc.)

What has changed?

On September 15, 2026, Google announced that Gemini in Google Workspace now supports external tool integration via the standard "MCP (Model Context Protocol)."

This allows you to directly call, check, and work with data from Salesforce, HubSpot (CRM), Asana, and Monday (project management) without leaving the Google Docs, Sheets, or Gmail screens.

What does this mean for office workers?

It reduces the hassle of switching between multiple services, such as opening Salesforce to write a daily sales report, opening Asana to check tasks, and opening Google Docs to write a report.

You can simply give instructions like "Summarize the list of deals lost last week into a spreadsheet" or "List the tasks due today from Asana in a document," and Gemini will cross-reference and collect data from each tool for you.

What should you do?

If your organization uses paid Google Workspace features (Gemini), check your company's integration settings.

Availability depends on your organization's administrative settings, but it could lead to time savings for tasks that span multiple services, such as sales and project management.

NEWS 3 | "Automatic switching of reasoning" discontinued for ChatGPT Plus/Pro

What has changed?

On September 14, 2026, OpenAI discontinued the "automatic switching to reasoning mode for difficult problems" feature for ChatGPT Plus and Pro users.

Previously, the AI would automatically switch to a "Thinking" mode to deliberate on prompts, but from now on, when deeper reasoning is required, users must manually select the available Thinking (reasoning) option from the model selection menu.

What does this mean for office workers?

If you have been relying on automatic switching, be aware that the system will no longer automatically switch to Thinking mode for difficult questions.

For business consultations involving complex logic, reviewing long contracts, or brainstorming multifaceted plans, you will need to be more conscious of model selection than before.

What should you do?

If you use ChatGPT Plus or Pro, get into the habit of manually switching models based on the difficulty of your questions.

For simple email rephrasing, a quick-response model is sufficient, but for complex business consultations or multifaceted considerations, be sure to select Thinking (reasoning) from the model selection screen as needed.

AI news you don't need to force yourself to follow this week

- OpenAI announces policy to 'eventually discontinue Custom GPTs and transition to plugins'

• Why you don't need to follow this : This is just the stage where the future direction has been indicated; the custom GPTs you are currently using will not stop working tomorrow. There is no need to rebuild them immediately this week. However, if you create and use Custom GPTs for work, just make sure to keep an eye on any migration notices that may appear in the future.

Gmail search AI Overviews global rollout

• Why you don't need to follow this : While this is an automatic summary feature for email search results, the current requirement for use is that your 'language setting must be English.' For office workers operating in a Japanese environment, it is perfectly fine to adopt a wait-and-see stance for an official announcement regarding Japanese language support.

If you only try one thing this week, make it this

[10 minutes first] Try installing the ChatGPT add-in for Microsoft Word

Let's set up 'ChatGPT for Word,' which became available this week, in your regular PC environment.

1. Open Word and go to the add-ins screen

• Launch Word and click 'Add-ins' (or 'Get Add-ins') from the 'Home' or 'Insert' tab in the top menu.

2. Search for and add ChatGPT

• Type 'ChatGPT' into the search box, select the official OpenAI add-in, and click 'Add'.

3. Sign in and have your text refined

• Once the ChatGPT sidebar appears on the right side of the screen, sign in with your ChatGPT account.
• Select some text in Word and try giving the sidebar a prompt like, "Refine this text to be more concise and business-appropriate."
• Try refining your text directly within the Word screen without moving to a separate window.

Summary of the Week

This week, the emergence of "ChatGPT for Word," which allows AI to run directly within Word, and the direct integration of Google Workspace with internal tools, highlighted a shift toward an environment where you can use AI without ever leaving the screen of your daily work software.

Also, as seen with the discontinuation of automatic thought-process switching in ChatGPT Plus/Pro, there are increasing situations where "the quality of your output changes depending on whether you know about tool specification changes."

Let's use this weekly report to grasp only the key points and apply them efficiently to our practical work.

[Request for Follow]

In this weekly report, we carefully select and deliver only the "essential AI news that makes daily work easier" for busy 40-something office workers every Saturday.

If you don't want to miss out, please follow us on note.

Read this weekly report in one place

The "AI Weekly Report for 40-Something Office Workers" is compiled in this magazine.

If you would like to read past issues as well, please check here.