GPT 5.3 Chat is now on AI Gateway
By Steven Van ·
Developers can enable the updated OpenAI model by setting the model to openai/gpt-5.3-chat in Vercel's AI SDK.
Vercel's AI Gateway now supports GPT-5.3 Chat (GPT 5.3 Instant). The update focuses on tone, relevance, and conversational flow, aiming for more accurate answers, better-contextualized web results, and fewer unnecessary refusals and caveats, and it reduces hallucination rates while producing smoother, more direct responses.
To use it, set the model to openai/gpt-5.3-chat in the AI SDK.
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