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OpenAI/Release Notes/Workspace agents support GPT-5.5; speech output and Slack threading added

Workspace agents support GPT-5.5; speech output and Slack threading added

June 2, 2026Release NotesView original ↗
5 features2 enhancementsThis release5 featuresNew capabilities2 enhancementsImprovements to existing featuresAI-tallied from the release notes

Rolling out new model, app access, and response capabilities for workspace agents in ChatGPT Business.

Workspace agents now support:

  • GPT-5.5 and reasoning effort controls: Creators can choose GPT-5.5 and set reasoning effort, with improved response speed
  • Guided agent setup: ChatGPT asks setup questions to help users create agents more quickly
  • Speech output: Agents can create audio files as part of responses
  • Smarter Slack thread replies: Agents can respond to relevant follow-up messages in threads after initial mention, with creator control over behavior

Workspace agents are now generally available in ChatGPT Business, Enterprise, and Edu. Agent builders can set safeguards on which actions agents can take for each enabled app. Admins can view workspace agent activity and usage in the admin console.

Free period for workspace agents extended until July 6, 2026. Credit-based pricing begins on that date.

Fetched June 4, 2026