Bloom AIModel showdown
Copilot vs ChatGPT.
Microsoft Copilot runs on OpenAI models. So why pay for both? Because what you get from each is genuinely different.
By Bloom AI ·
The short verdict
Pick Copilot if
- — You live inside Microsoft 365 — Word, Excel, Outlook, Teams.
- — Your company already pays for Microsoft and Copilot is included or trivial to add.
- — You want AI inside the apps where the work happens, not in a separate tab.
- — You need enterprise-grade security and data-handling guarantees from Microsoft.
Pick ChatGPT if
- — You want the latest OpenAI models the moment they ship.
- — You use voice mode, image generation, and Custom GPTs.
- — You want a model-first product, not an app-integrated assistant.
- — You're not embedded in Microsoft 365 and don't need the Office integration.
Both, honestly. Inside an enterprise the typical answer is both — Copilot inside the Office suite for everyday productivity, ChatGPT for power users who want voice, image, Custom GPTs, and the newest models. They are not in competition; they are layered.
Side by side
| Copilot | ChatGPT | |
|---|---|---|
| Maker | Microsoft | OpenAI |
| Underlying models | OpenAI GPT family, plus Microsoft's own | OpenAI GPT family |
| Surface | Word, Excel, Outlook, Teams, Windows, Edge | ChatGPT app, web, mobile, API |
| Best at | Working inside Microsoft 365 documents | Conversational AI, voice, image, Custom GPTs |
| Voice mode | Copilot Voice — capable but not the same product | Realtime voice; best on the market |
| Image generation | Designer (DALL·E powered) | Native image generation in chat |
| Custom GPTs | No — Copilot Studio for agents instead | Custom GPTs and the GPT Store |
| Model freshness | Lags ChatGPT by weeks-to-months at the frontier | First access to new OpenAI models |
| File integration | Reads your Microsoft 365 files natively | Upload manually per chat |
| Enterprise security | Microsoft 365 compliance boundary; data stays in tenant | Strong, but a separate vendor relationship |
| Pricing | Copilot Pro $20/mo; Microsoft 365 Copilot $30/user/mo for business | ChatGPT Plus $20/mo; Pro $200/mo; Team and Enterprise |
| Consumer / business split | Copilot is the consumer brand; M365 Copilot is the business one | ChatGPT Plus consumer; ChatGPT Team and Enterprise for business |
Where Copilot wins
Inside Microsoft 365. Copilot lives in Word, Excel, Outlook, Teams, and Windows. It reads your files, your email, your calendar, your meetings — with permission inside your tenant. ChatGPT cannot do this without manual uploads.
Enterprise compliance. For an organization on Microsoft 365 E5, Copilot lives inside an existing compliance boundary. Procurement is a checkbox, not a vendor evaluation. ChatGPT requires a separate purchase, separate DPA, separate trust review.
Distribution. Every Windows PC ships with Copilot. Every Edge browser has it in the sidebar. Microsoft can place AI inside surfaces no competitor can touch.
The right answer for most knowledge workers. If you spend your day in Word, Outlook, and Teams, Copilot is the AI you'll actually use. ChatGPT is the AI you'll forget to open.
Where ChatGPT wins
Model freshness. When OpenAI ships a new model, ChatGPT gets it first. Copilot gets it weeks or months later, after Microsoft validates and integrates. For power users this lag matters.
Voice mode. OpenAI's realtime voice is the best conversational interface ever shipped. Copilot Voice exists but it is not the same product.
Custom GPTs and the Store. Build a custom assistant, publish it, share it. Copilot Studio is the enterprise equivalent but it is heavier and less consumer-friendly.
Model-first product. ChatGPT is built around the model; Copilot is built around the apps. For workflows where you want to actually talk to the model rather than have it help you fill a cell, ChatGPT is the better fit.
Frequently asked
- Is Copilot just ChatGPT?
- No. Copilot uses OpenAI models under the hood (and some Microsoft models), but the product is fundamentally different — it lives inside Microsoft 365 and reads your files. ChatGPT is a model-first product. Same engine, very different car.
- Should I get Copilot or ChatGPT?
- If you live in Microsoft 365: Copilot. If you want the newest models, voice, image, and Custom GPTs: ChatGPT. Most enterprises eventually buy both.
- Which is cheaper, Copilot or ChatGPT?
- Copilot Pro and ChatGPT Plus are both $20/mo for consumers. Microsoft 365 Copilot is $30/user/month for business, on top of your existing M365 license. ChatGPT Team is $25/user/month.
- Does Copilot have voice mode?
- Yes — Copilot Voice. It works. But ChatGPT's realtime voice is the category benchmark and Copilot has not closed that gap.
- Which gets new OpenAI models first?
- ChatGPT. Copilot lags by weeks to months while Microsoft validates and integrates each release. For frontier-first users this matters.
- Can Copilot read my files like ChatGPT can?
- Better. Copilot reads your Microsoft 365 files natively inside the tenant — no upload. ChatGPT requires you to upload files manually per chat. For Office work, Copilot is the better file experience.