GPT 5.4 Nano is the smallest and most affordable model in the GPT-5.4 family, performing close to GPT-5.4 Mini in evaluations at a lower price point, built for high-volume sub-agent workflows.
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.4-nano', prompt: 'Why is the sky blue?'})GPT 5.4 Nano became available on March 17, 2026 on AI Gateway as the smallest and most affordable model in the GPT-5.4 family. It performs close to GPT-5.4 Mini in evaluations while costing less per token, making it well-suited for high-volume use cases where cost scales with the number of parallel calls.
The model supports verbosity and reasoning level parameters, giving you control over how much the model reasons before answering. It's built for sub-agent workflows where multiple smaller models coordinate on parts of a larger task, and its price point makes per-request inference viable at the highest traffic levels.
With a context window of 400K tokens, GPT 5.4 Nano can process substantial inputs even when outputs remain short. For classification, routing, lightweight code checks, and batch processing at scale, it provides GPT-5.4 generation quality at the lowest cost in the family.