The Verge·May 5, 2026

🤖OpenAI Launches GPT-5.5 Instant for ChatGPT

ChatGPT's new model is less likely to make stuff up

TL;DR

OpenAI introduces GPT-5.5 Instant, reducing hallucinations by 52.5% and inaccurate claims by 37.3%. Enhanced personalization rolls out to Plus and Pro users first.

OpenAI has launched GPT-5.5 Instant for ChatGPT, boasting significant improvements in factuality across the board. This new model slashes hallucinations by 52.5% on high-stakes prompts and inaccurate claims by 37.3%, making it more reliable for everyday tasks like analyzing images and pulling context from previous chats or Gmail. Plus and Pro users will see enhanced personalization features first, with plans to roll out the improvements to all tiers soon.

OpenAI Launches GPT-5.5 Instant for ChatGPT

Key Points

1

ChatGPT's new model reduces hallucinated claims by 52.5% on high-stakes prompts

2

Inaccurate claims drop by 37.3%, improving overall factuality across tasks

3

Enhanced personalization rolls out to Plus and Pro users first, with mobile support coming soon

4

GPT-5.5 Instant will be available for all ChatGPT users starting Tuesday

5

Memory sources feature lets users see and correct context used in personalized responses

Why It Matters

If you're using ChatGPT for critical tasks or relying on its accuracy, GPT-5.5 Instant's improvements are a game-changer. With fewer hallucinations and more precise fact-checking, the new model ensures your interactions with AI are reliable and trustworthy.

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Frequently Asked Questions

Why does this matter?

If you're using ChatGPT for critical tasks or relying on its accuracy, GPT-5.5 Instant's improvements are a game-changer. With fewer hallucinations and more precise fact-checking, the new model ensures your interactions with AI are reliable and trustworthy.

What happened?

OpenAI introduces GPT-5.5 Instant, reducing hallucinations by 52.5% and inaccurate claims by 37.3%. Enhanced personalization rolls out to Plus and Pro users first.

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