ChatGPT vs Copilot for dyslexic employees: 4 tasks, which wins

Four hours a day. That is what one Hargreaves Lansdown employee with dyslexia saved after her employer deployed Microsoft 365 Copilot (Microsoft Accessibility Blog, 2026). She did not become a faster writer. She stopped doing the cognitive loop that eating her day: reading incoming content, holding it in working memory, switching to a separate window, and trying to reassemble it into the right words.

That loop is the real problem. And both ChatGPT and Copilot can break it. The question is where they break it, and whether that matches where your actual work happens.

ChatGPT Plus costs $20 a month (OpenAI, June 2026). Microsoft 365 Copilot costs £16.10 per user per month on an annual plan from July 2026 (Microsoft UK, June 2026). The gap between them is under £1. Price should not be your deciding factor.

The copy-paste trap that nobody mentions

ChatGPT is a separate application. You open it in a browser tab. You paste in your email. You describe what you want. You read the response. You switch back to Outlook. You paste it in. You hit send.

That is 6 steps for one email, and 4 of them involve switching context.

For a dyslexic employee, context-switching costs working memory. Each switch is a chance to lose the thread of what you were trying to say, or to introduce a new error when you paste something in the wrong place. The drafting tool that requires the least context-switching wins, full stop.

Copilot opens inside Outlook. You click "Draft with Copilot." You type 3 bullet points about what the email needs to say. Copilot produces a complete draft in your inbox. You review and send. That is 2 steps.

The same logic applies in Teams (Copilot produces a meeting summary without you doing anything) and in Word (Copilot rewrites your document while it is open). You never leave the app you are already in.

If switching between windows costs you working memory, the tool that removes the most context-switching from the apps you already live in wins. That is the only question worth asking.

4 tasks: which tool wins each one

These are the 4 tasks that come up most often for dyslexic employees at work. The winner in each case is based on how much friction the tool removes, not on raw AI capability.

Task	ChatGPT Plus	Microsoft 365 Copilot
Email drafting	Strong output, but requires copy-pasting into Outlook and back	Built into Outlook. Draft from bullet points. No copy-paste.
Meeting notes and summaries	Good if you paste a transcript manually; no automatic capture	Built into Teams. Summarises the meeting as it happens, or after.
Rewriting documents and reports	Strong for open-ended rewrites; useful for non-Microsoft formats	Built into Word. Rewrites within the document, in context.
Summarising varied content (PDFs, websites, voice notes)	Stronger. Handles any file type and source without restrictions.	Limited outside the Microsoft 365 ecosystem.

The pattern is consistent. Copilot wins when the task starts and ends inside a Microsoft app. ChatGPT wins when the content comes from somewhere else.

One area where ChatGPT is clearly ahead: voice-to-text drafting outside of meetings. ChatGPT's voice mode lets you speak a rough draft out loud and converts it into a polished email. You do not need to be in a Teams call. You do not need a transcript. You just speak, and it writes.

Copilot has meeting-based voice capture in Teams, but it only works during a recorded meeting. For the dyslexic employee who needs to dictate a quick email or a daily note at their desk, ChatGPT voice mode fills a gap that Copilot does not cover.

Run through where your most frustrating writing tasks start. If the answer is "in Outlook and Teams," Copilot removes more friction. If it's "everywhere," ChatGPT handles more of what you need.

Pricing in 2026: they are essentially the same

ChatGPT Plus is priced in USD: $20 per month (OpenAI pricing page, June 2026). At current exchange rates, that is approximately £16. The subscription gives you full access to GPT-5.4, voice mode, Deep Research, image generation, and agent features.

Microsoft 365 Copilot is an add-on to your existing Microsoft 365 subscription. The business rate is £16.10 per user per month on an annual commitment from July 2026 (Microsoft UK, June 2026). A promotional rate of £13.80 is available through 30 June 2026. This is separate from your base M365 licence; if your employer already pays for Microsoft 365 Business Standard or above, you can ask for the Copilot add-on as a reasonable adjustment.

Ask your IT department whether your current licence already includes any Copilot features. Microsoft has been expanding the free tier of Copilot Chat inside Teams since April 2026, which means you may already have more than you realise.

Before spending anything, email IT and ask: "Does our current M365 licence include any Copilot or AI features?" The answer may save you £16 a month.

The free option worth trying first

On 7 April 2026, Microsoft expanded Copilot Chat into Teams meetings and channels for all M365 users at no additional cost (Windows News AI, April 2026). This free tier lets you chat with Copilot inside Teams channels, ask questions about past conversations, and get basic assistance without leaving the app.

Full meeting summarisation (a structured summary of who said what and what was decided after the call) still requires the paid Copilot add-on. But the free tier is enough to test whether the in-app experience reduces friction before you commit to a subscription.

ChatGPT also has a free tier. The free version now includes access to GPT-4o with usage limits. For occasional email rewrites and one-off document summarisation, it works. For daily professional use across a full inbox, the limits become a problem within a few days.

Spend one week using both free tiers. You will know quickly which one you reach for first, and which one's friction stops you from bothering.

Most dyslexic employees who try both free tiers reach one of two conclusions: either Copilot in Teams already does what they needed and the paid version is obvious, or the copy-paste overhead of ChatGPT is so irritating that they never open it a second time. Either outcome tells you exactly where to spend £16 a month.

Try both free tiers for a week before paying for anything. The friction you notice is your answer.

Which to buy: the call

Here is the decision, by situation:

If you are still undecided: ask your employer to fund whichever one aligns with your daily apps as a reasonable adjustment under the Equality Act 2010 (UK) or ADA (US). The cost of either subscription is well below any undue hardship threshold. A dyslexia assessment report or workplace needs assessment that documents how writing affects your work is enough to support the request.

Dyslexic employees who need help structuring that conversation with their employer can use the reasonable adjustments builder, which turns your specific challenges into a draft email and a conversation plan in about two minutes.

The most common mistake is choosing ChatGPT because it is more well-known, then spending 10 minutes every morning copy-pasting your inbox into it. If you work in Outlook, that 10 minutes compounds daily into something that costs you more cognitive energy than it saves. Choose the tool that meets you where you already are.

Access to Work: both tools qualify

Both ChatGPT Plus and Microsoft 365 Copilot qualify as assistive technology under the UK's Access to Work scheme (CallingAllMinds.com Access to Work Guide, 2026). If you have a formal dyslexia assessment, you can apply to have the subscription funded through Access to Work.

The application process: go to gov.uk/access-to-work, describe specifically how email drafting, meeting note-taking, and document writing are affected by your dyslexia, and name the tool you want funded. Keep receipts. Access to Work reimburses the cost after approval, up to the grant cap.

Only 1 in 10 dyslexic employees eligible for Access to Work funding have ever applied (British Dyslexia Association, January 2024). An AI writing tool subscription is one of the most straightforward claims to make: the cost is low, the direct link to a workplace writing difficulty is easy to document, and the adjustment is clearly reasonable.

The Access to Work calculator shows you what you could claim and walks through the application steps. If you are deciding whether an assessment is worth pursuing to access tools like these, the dyslexia assessment cost guide covers the full cost breakdown and the Access to Work reimbursement route.

For US employees: both tools qualify as reasonable accommodations under the ADA. Request them through your employer's HR or accommodation process. The interactive process requires your employer to engage with the request. The cost of either tool is well below any undue hardship threshold for any employer of any size.

In the UK, there is no reason to pay for these tools out of your own pocket if you have a dyslexia assessment. Access to Work exists specifically to fund them. Apply before you subscribe.