OpenAI Will Retire Custom GPTs in December 2026
The company is transitioning its AI extension capabilities to a new plugin architecture.
Updated on Oct. 5, 2026 in Artificial Intelligence
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OpenAI will officially retire its Custom GPTs feature on December 11, 2026. The company is shifting its platform to a new plugin architecture that supports Model Context Protocol servers.
Why it matters
OpenAI is consolidating its various AI extension mechanisms into a single, reusable plugin format. This transition aims to streamline how developers and enterprises build and manage extensions for ChatGPT and Codex.
The new plugin architecture supports Model Context Protocol servers, replacing the previous instruction and file-based logic. Migrated GPT instructions will function as skills, while knowledge files transition to reference files.
The players
OpenAI
OpenAI is an artificial intelligence research organization that develops advanced generative models including ChatGPT and Codex.
The details
Creators must migrate existing tools through the My GPTs interface, though OpenAI warns that migrated plugins may respond differently than original GPTs. Existing GPT conversations will not migrate to the new system, and all new plugins will start with private access settings by default.
Timeline
October 26, 2026: Enterprise workspaces stop creating new Custom GPTs.
December 11, 2026: General retirement date for Custom GPTs.
February 11, 2027: Final deadline for qualifying Enterprise deferrals.
The Tech Race
This transition signals a move toward standardized interoperability across the AI sector, likely replacing legacy, siloed extension models. By adopting the Model Context Protocol, OpenAI is aligning its tools with broader industry trends in decentralized AI data access.
Users will need to proactively migrate their custom tools via the My GPTs interface to maintain functionality within the new plugin system. Because existing chat histories do not transfer, users should document key instructions and files before the December deadline.
The takeaway
Developers and power users should begin auditing their existing Custom GPTs now to prepare for the inevitable shift in logic and file structure. Prioritizing manual migration early will help mitigate potential downtime and behavior changes in their automated workflows.
What happens next
Enterprise workspaces will cease the creation of new Custom GPTs on October 26, 2026, followed by the full system retirement on December 11, 2026, and a final cutoff for deferred enterprise customers on February 11, 2027.
Further reading
For more on the evolution of automated tools, explore Artificial Intelligence.
Source note: This article includes information reported by THE Journal.
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Will your current AI workflows function effectively after the transition to the new plugin architecture?
