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To keep improving Glean and deliver the best experience, we occasionally retire features. When that happens, we’ll provide advance notice, share timelines, and recommend alternatives to ensure a smooth transition for admins and affected customers. Glean will use commercially reasonable efforts to notify customers at least 60 days in advance of feature retirements. Notifications may be made through the Glean application or to the customer emails on file. For Supported LLMs, please see LLM Administration.

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Glean feature retirements

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Glean Assistant: Datasource filtering and source removal

Announcement Date: November 5, 2025

Retirement Date: December 4, 2025

The ability to filter specific sources in chat and the option to remove sources from existing Assistant responses are being removed to streamline the user experience and because the latest generation of Glean Assistant, powered by advanced LLMs like GPT-5 and Claude Sonnet 4.5, now provides more accurate, context-aware answers without requiring manual source selection. Users can continue to filter specific sources in search (ROAD-938).

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Assistant

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Agentic Engine V1 (Customer Key: OpenAI & Claude)

Announcement Date: September 9, 2026

Retirement Date: January 31, 2026

Applicable to Customer Key OpenAI and Claude Customers.

Glean has upgraded to a more powerful agentic engine that can plan, iterate, and adapt on the fly, so it can take on more complex, end‑to‑end work. The Agentic engine powers the Glean platform, including but not limited to the Assistant and Agents.

Customers must enable the new Agentic Engine V2 before the retirement date to avoid service disruptions. Going forward, new Assistant and Agent capabilities will be built exclusively on Agentic Engine 2, and no support or fixes will be provided for issues found in customers’ Agentic Engine v1 environments.

Customer Key Gemini Customers will be given at least 60 days’ notice of the retirement of Agentic Engine V1 on Gemini, once Gemini is available on Agentic Engine V2.

No Action is required for Glean universal model key customers who were automatically migrated in October 2025.

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