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GPT 5.4 Mini

GPT 5.4 Mini is the cost-efficient member of the GPT-5.4 family, delivering strong performance in code generation, tool orchestration, and multi-step browser interactions at a price point designed for agentic production workloads.

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index.ts
import { streamText } from 'ai'


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

  • How does GPT 5.4 Mini compare to GPT-5 mini?

    It handles code generation, tool orchestration, and multi-step browser interactions more reliably. It also supports verbosity and reasoning level parameters for tunable output.

  • What context window does GPT 5.4 Mini support?

    400K tokens, supporting extended inputs for agentic workflows.

  • What are the verbosity and reasoning level parameters?

    They give you control over response detail and how much the model reasons before answering, letting you tune the cost-quality tradeoff per request.

  • Is GPT 5.4 Mini suitable for sub-agent workflows?

    Yes. It's built for sub-agent architectures where multiple smaller models coordinate on parts of a larger task.

  • When should I use GPT-5.4 Nano instead?

    When cost is the dominant concern and you're running high-volume parallel calls. GPT-5.4 Nano performs close to mini in evaluations at a lower price point.

  • How does AI Gateway handle authentication for GPT 5.4 Mini?

    AI Gateway accepts a single API key or OIDC token for all requests. You don't embed OpenAI credentials in your application; AI Gateway routes and authenticates on your behalf.

  • What are typical latency characteristics?

    This page shows live throughput and time-to-first-token metrics measured across real AI Gateway traffic.