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OpenAI Rolls Out GPT-5.5 Instant with Deep Gmail Personalization

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OpenAI is rolling out GPT-5.5 Instant as the default model for all ChatGPT users over the next two days. This version follows the initial GPT-5.5 launch but is optimized for speed. It delivers smarter, clearer answers in a warmer tone while remaining more concise than previous iterations.
Default model
GPT-5.5 Instant
API identifier
gpt-5.5-chat-latest
Rollout duration
2 days
Personalization sources
Gmail, saved memories, files, and others
Availability (Personalization)
Plus and Pro users on web

The update shifts ChatGPT toward a proactive assistant by integrating context from connected Gmail accounts, files, and saved memories. A new "Memory sources" feature identifies exactly which context was used for a response. This brings Codex for Work automation capabilities to consumer plans through deep data integration.

You can access the model via the API using the gpt-5.5-chat-latest identifier. While the model is the new default, personalization and Gmail features are currently limited to Plus and Pro users on the web. Mobile support for these memory-driven capabilities is expected to follow soon.

View the full update on openai.com
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GPT-5.5 Instant is starting to roll out in ChatGPT. It’s a big upgrade, giving you smarter, clearer, and more personalized answers in a warmer, more natural tone. And it's also more concise, which we heard you wanted. We think you'll love chatting with it. https://t.co/HSQOhjqxp7

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Still wondering? A few quick answers below.

GPT-5.5 Instant is the latest default model for ChatGPT, designed to be faster and more concise than previous versions. It provides smarter and clearer answers using a more natural, warmer tone. The model is optimized for everyday tasks and is currently rolling out to all users across the platform.

Memory sources are a new transparency feature that shows exactly which pieces of context were used to personalize a response. This includes information from saved memories, past conversations, uploaded files, or connected Gmail accounts. Users can view these sources to understand the AI's reasoning and update or delete specific context.

The deep personalization improvements, including the ability to use context from connected Gmail accounts and files, are currently available to ChatGPT Plus and Pro users on the web. OpenAI plans to bring these features to mobile users soon. Standard memory source transparency is rolling out to all consumer plans.

Developers can access the new model through the OpenAI API by using the model identifier gpt-5.5-chat-latest. This endpoint provides the most current version of the chat-optimized GPT-5.5 Instant model. It is designed for high-speed interactions and is rolling out alongside the consumer update to ChatGPT over two days.

GPT-5.5 Instant is starting to roll out now and will become the default model for all ChatGPT users over the next two days. While the base model is available to everyone, specific features like Gmail integration and advanced personalization are currently limited to paid Plus and Pro subscribers.

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