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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.

Input and output price
Input $5, Output $30, Per 1M tokens
24h uptime
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Base model
Get API keyRead the docs
import { streamText } from 'ai'


const result = streamText({
  model: 'openai/gpt-5.4-fast',
  prompt: 'Why is the sky blue?'
})
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