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, ...

OpenAI’s GPT-5.5 Instant just got smarter, but don’t expect a lot of details

Earlier this week, OpenAI announced via release notes that it has updated its most widely used AI model: GPT-5.5 Instant.