OpenAI GPT-5.5 Instant ChatGPT interface on a laptop with a glowing AI brain icon, representing the new default model's advanced capabilities.
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OpenAI GPT-5.5 Instant Revolutionizes ChatGPT with Reduced Hallucinations and Enhanced Context Management

OpenAI has officially released GPT-5.5 Instant, a new foundation model that now serves as the default for ChatGPT, replacing GPT-5.3 Instant. This update, announced on Monday, brings significant improvements in accuracy, context management, and performance across key benchmarks. The company emphasizes that GPT-5.5 Instant reduces hallucination rates in sensitive domains such as law, medicine, and […]