ChatGPT Writing Style: How OpenAI’s Test Uses Connected Apps to Match Your Voice

ChatGPT’s experimental Writing Style feature is intended to make generated drafts sound more like the person using it. Rather than requiring someone to paste the same examples or tone instructions into every prompt, the test lets ChatGPT reference writing from selected connected services. The feature remains limited to a small group of users, so it should not be treated as a broadly available ChatGPT setting. 35

What ChatGPT Writing Style does

The onboarding language reported for the experiment says that ChatGPT will write in the user’s voice by referencing examples from connected apps. The apparent goal is voice matching across everyday work: a short message, an email draft, or a longer document can begin from the user’s established tone and phrasing. 5

The setup screen organizes reference material into three categories:

• Messaging: Slack
• Documents: Google Drive and Notion
• Email: Gmail

That structure suggests the feature can use writing from different kinds of work rather than relying on a single manually supplied sample. It does not establish that every connected app is always consulted, or that each source is weighted the same way. 35

Where eligible users can enable it

Reports say accounts included in the test can find the control in ChatGPT’s Settings → Personalization → Writing area. The setting is labeled “Reference my writing style” and may appear as a toggle or as a setup option. If that control is absent, the account is likely not included in the current experiment. 1

How it differs from Claude Styles

The distinction is mainly in how style examples are supplied.

Claude offers preset and custom Styles. Its custom-style workflow can analyze writing that a user uploads from a device or pastes directly into the product.

ChatGPT’s Writing Style test, by contrast, is centered on examples located in services the user has connected and approved, including Slack, Gmail, Google Drive, and Notion. 5 In practical terms, that could make the reference set more contextual: emails, messages, and documents may each reflect different habits. But OpenAI has not publicly explained the exact mechanism used to select or apply those examples.

What is still unknown

The available reporting does not answer several important implementation questions:

• Whether ChatGPT creates a one-time style profile during setup or consults connected writing when generating drafts.
• Whether the style understanding is periodically refreshed as new emails, messages, or documents are created.
• How much source material is used, how long any derived style information is retained, and what controls users will receive over it.

As a result, it is not supported to say that ChatGPT continuously learns from a user’s connected apps. The test demonstrates that connected writing can be used as reference examples; its update schedule and underlying data-handling details have not been publicly specified. 35

Availability and wider release

OpenAI has confirmed that Writing Style is being tested with a small user group, according to reporting on the experiment. No public eligibility criteria, general-release date, or commitment to a wider rollout has been announced. 3

For now, the most accurate takeaway is simple: Writing Style is an early personalization test, not a guaranteed feature. Users who see it should review the connected sources they authorize and treat its output as a draft that still needs human review.