AI assistants push deeper into workplace apps: OpenAI tests ChatGPT Writing Style on connected Slack, Gmail and Drive data as Slack launches AI-built Surfaces

OpenAI confirmed it is testing a ChatGPT 'Writing Style' feature that mimics a user's voice using writing samples from connected apps (Slack, Google Drive, Notion, Gmail), currently limited to a small group with no rollout date. Separately, Slack launched…

Two related AI-in-the-workplace announcements emerged in September 2026 and are merged here as one story. Per BleepingComputer (2026-09-07T10:36:37Z), OpenAI confirmed it is testing ChatGPT Writing Style, which learns a user's voice from writing samples in connected apps; the onboarding flow references Messaging (Slack), Documents (Google Drive and Notion), and Email (Gmail) as example sources. The outlet reports it resembles Anthropic's Styles personalization feature but draws on existing writing inside connected services rather than uploaded samples. The feature is available to a small group of users, with no general rollout date announced. Per The Verge (2026-09-10T21:25:21Z), Slack launched Slackforce Surfaces, which uses AI to gather context from conversations and connected apps such as Google Drive and Salesforce to generate shareable interactive reports, polls, dashboards, and presentations; Surfaces can be pinned to channels where colleagues can view, interact, and comment. They are generated by describing needs to Slackbot in natural language, data access is limited to what workspace AI permissions allow, and the feature is available to all customers, including free users, with Slackbot enabled. Live data support starts in October (year not specified in the report). The two reports cover distinct products from different vendors and do not conflict on any stated facts; the common thread is AI tools gaining access to connected workplace apps, with Google Drive cited in both and Slack appearing both as a data source for OpenAI's test and as the maker of Surfaces.

• OpenAI confirmed testing ChatGPT 'Writing Style,' which mimics a user's voice from writing samples in connected apps (BleepingComputer, 2026-09-07).
• Writing Style onboarding references Messaging (Slack), Documents (Google Drive and Notion), and Email (Gmail) as example categories.
• Per BleepingComputer, Writing Style extends Anthropic's Styles approach by referencing existing writing inside connected services rather than pasted/uploaded samples.
• Writing Style is currently limited to a small group of users; no general rollout date has been announced.
• Slack launched Slackforce Surfaces, letting Slackbot build interactive dashboards, reports, and microsites directly inside chat channels (The Verge, 2026-09-10).
• Surfaces gather context from conversations and connected apps such as Google Drive and Salesforce to generate shareable interactive reports, polls, dashboards, and presentations.
• Surfaces can be pinned to channels where colleagues can view, interact, and comment.
• Surfaces are generated by describing needs to Slackbot in natural language; data access is limited to what workspace AI permissions allow.