GPT-5.3 Instant System Card
OpenAI
GPT-5.3 Instant is a new model in the GPT-5 series offering faster responses and better web search context.Summary
GPT-5.3 Instant is the latest model in the GPT-5 series, designed to improve conversational flow by responding faster and providing richer, better-contextualized answers during web searches. It aims to reduce dead ends, unnecessary caveats, and overly declarative phrasing. The comprehensive safety mitigation strategy for GPT-5.3 Instant is largely consistent with that detailed for GPT-5.2 Instant in its respective System Card. For reference within this document, GPT-5.3 Instant is also referred to as gpt-5.3-instant.2026.
(Source：OpenAI)