ChatGPT Joins Slack, Teams With @Mention

This is ChatGPT moving from a destination app into the collaboration layer where work already happens—a direct challenge to Slack AI and Microsoft Copilot. The real value will depend less on model quality than on permission design and connection coverage.

• –Thread-native invocation removes the copy-paste friction that limits workplace AI adoption.
• –Admin-configured connections let teams ground responses in approved company context, but add setup and governance overhead.
• –Service-account behavior means personal ChatGPT memories and history do not automatically carry over.
• –Shared replies and generated files remain visible to conversation participants, making access controls and review essential.
• –Slack and Teams already offer comparable summarization and search features, so ChatGPT’s differentiation will come from cross-tool workflows and artifact creation.[OpenAI Slack](https://openai.com/business/plugins/slack/), [OpenAI Microsoft Teams](https://openai.com/business/plugins/microsoft-teams/)