AI BriefingGPT-5.5 Instant Released
Key point
OpenAI has updated the default ChatGPT model to GPT-5.5 Instant.
Details
OpenAI has updated the default model for ChatGPT to GPT-5.5 Instant.
This change focuses on making responses more accurate and concise, and strengthening personalization by better reflecting context users have already shared. The company also said the model's ability to analyze images and photos, answer STEM questions, and judge when to use web search has been improved.
In internal evaluations, hallucinatory claims decreased by 52.5% on high-stakes prompts where accuracy matters, such as those related to medicine, law, and finance, and inaccurate claims decreased by 37.3% in challenging conversations where users flagged errors.
In short, ChatGPT's everyday default model has been refined to deliver more reliable and more natural responses.
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