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OpenAI

GPT 5.4 (Fast)

GPT-5.4 is OpenAI's best general-purpose model, part of the GPT-5 flagship model family. It's their most intelligent model yet for both general and agentic tasks. Your use is subject to OpenAI's Terms & Privacy Policies.

ReasoningTool UseVision (Image)File InputImplicit CachingWeb SearchWebsockets
Use with AI GatewayView docs
import { streamText } from 'ai'


const result = streamText({
  model: 'openai/gpt-5.4-fast',
  prompt: 'Why is the sky blue?'
})
Read docs
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P50 time to first token (TTFT) on live AI Gateway traffic, in milliseconds. View the docs for more info.