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OpenAI News · May 5, 2026

GPT-5.5 Instant: smarter, clearer, and more personalized

news Model EvaluationPrompt InjectionAgent Security
Why it matters

GPT-5.5 Instant updates ChatGPT’s default model with smarter, more accurate answers, reduced hallucinations, and improved personalization controls.

My takeaway: GPT-5.5 Instant updates ChatGPT’s default model with smarter, more accurate answers, reduced hallucinations, and improved personalization controls.