OpenAI ChatGPT Update

May 5, 2026: ChatGPT rolls out memory sources, more personalized responses, and GPT-5.5 Instant as the new default model. It also launches ChatGPT for Excel and Google Sheets globally.

• Memory controls let users delete chats, use temporary chats, turn off memory, disconnect apps, and manage model-improvement data sharing.

• GPT-5.5 Instant improves accuracy, clarity, conciseness, image understanding, STEM answers, and web-search behavior.
• Responses are more direct and less cluttered, with fewer unnecessary follow-up questions and less overformatting.

• Memory sources view shows which saved memories, past chats, custom instructions, files, and referenced Gmail emails helped personalize a response.
• GPT-5.5 Instant becomes the new default ChatGPT model for all users.
• ChatGPT for Excel and Google Sheets is now available globally as a sidebar integration for spreadsheet assistance.

• Memory sources are rolling out on the web first and coming to mobile soon.
• Paid users can keep using GPT-5.3 Instant for three months through model settings before retirement.
• Install ChatGPT for Excel from Microsoft Marketplace or ChatGPT from Google Workspace Marketplace, then sign in with an eligible ChatGPT account.
• Free and Go plans have limited usage for spreadsheet integrations; Plus and Pro use the same agentic usage limits as Codex, with additional credits available.

Product Information

Vendor: OpenAI

Product: ChatGPT

Release date: May 5, 2026