GPT 5.3 Chat now available on AI Gateway
GPT 5.3 Chat (GPT 5.3 Instant) is now available on AI Gateway with improvements to tone, relevance, conversational flow, and reduced hallucination rates. Use the model by setting model to openai/gpt-5.3-chat in the AI SDK, and leverage AI Gateway's unified API for usage tracking, cost management, and performance optimizations.
GPT-5.3 Chat (GPT 5.3 Instant) is now available on AI Gateway.
This update focuses on tone, relevance, and conversational flow for more accurate answers, better-contextualized web results, and fewer unnecessary refusals and caveats. It also reduces hallucination rates and produces smoother and more direct responses.
To use this model, set model to in the AI SDK.openai/gpt-5.3-chat
AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in , support, and intelligent provider routing with automatic retries.observabilityBring Your Own Key
Learn more about , view the or try it in our .AI GatewayAI Gateway model leaderboardmodel playground
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