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OpenAI claims ChatGPT’s new default model hallucinates way less

OpenAI's new GPT-5.5 Instant model for ChatGPT reportedly produces 52.5% fewer hallucinated claims on high-stakes prompts in medicine, law, and finance, and 37.3% fewer inaccurate claims on challenging conversations. The model also delivers tighter responses, avoids excessive emojis, and improves image analysis and web search. Enhanced personalization leverages context from previous chats and Gmail, with a new 'memory sources' feature showing used context. Rollout begins Tuesday to all ChatGPT users, with the old model available for three months.

SourceThe Verge AIAuthor: Jay Peters
OpenAI claims ChatGPT’s new default model hallucinates way less
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Key points

  • GPT-5.5 Instant shows 52.5% fewer hallucinated claims on high-stakes prompts.
  • Model responses are more concise and use fewer gratuitous emojis.
  • Improved personalization integrates chat history and Gmail context.
  • New 'memory sources' feature provides transparency on context used.

Highlights and analysis are generated automatically and may contain errors. Check the original source.

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