OpenAI's updated GPT-5.5 Instant is better at shopping, complex constraints, and understanding user intent — and it's already in the API

OpenAI is moving away from models that require heavy hand-holding and toward systems that can better infer the user’s goal, ...
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ChatGPT’s Everyday Model Gets a Major Context Upgrade

OpenAI updated GPT-5.5 Instant to better handle context, follow-ups, complex prompts, local recommendations, and ...