← Back
Vercel
GPT-5.3 Chat now available on Vercel's AI Gateway with improved accuracy and reduced hallucinations
Vercel AI SDKVercel · releasemodelintegrationapi · vercel.com ↗

GPT-5.3 Chat Now Available on AI Gateway

OpenAI's GPT-5.3 Chat model (GPT-5.3 Instant) has been integrated into Vercel's AI Gateway, enabling developers to access the model through a unified API interface.

Key Improvements

This release focuses on:

  • Enhanced conversational quality with improved tone and relevance for more accurate answers
  • Better web search contextualization with more relevant results
  • Reduced hallucination rates for more factual outputs
  • Smoother responses with fewer unnecessary refusals and caveats
  • Direct communication without verbose qualifications

Integration & Usage

To use GPT-5.3 Chat in your application, set the model identifier to openai/gpt-5.3-chat in the Vercel AI SDK:

import { streamText } from 'ai';

const result = streamText({
  model: 'openai/gpt-5.3-chat',
  prompt: 'Best restaurants in SF for a birthday dinner.',
});

AI Gateway Benefits

Beyond model access, Vercel's AI Gateway provides developers with:

  • Unified API for multiple models and providers
  • Usage tracking and cost management
  • Built-in observability and performance monitoring
  • Intelligent provider routing with automatic retries and failover
  • Bring Your Own Key support for enterprise deployments

Developers can explore the model in Vercel's model playground or review the AI Gateway model leaderboard to compare performance across available models.