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OpenAI updated GPT-5.5 Instant, ChatGPT's default model, to better understand context and adapt to complex, multi-step queries. The upgrade improves handling of clarifications, location context, and multiple question points. The model previously showed 52.5 percent fewer hallucinations and 37.3 percent fewer factual errors in testing.
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Summary by ByteBrief
OpenAI is making GPT-5.5 Instant 'more fun' to talk to