ChatGPT's new default model is more factual and better at personalization
Engadget | 06.05.2026 00:59
Hot on the heels of its recent GPT-5.5 release, OpenAI is updating ChatGPT's default model to GPT-5.5 Instant. OpenAI touts GPT-5.5 as producing 52.5 percent fewer hallucinated claims in internal testing, and 37.3 percent fewer inaccurate claims when taking on conversations ChatGPT users had flagged for factual errors.
