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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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What To Consider When Choosing a Provider

  • Configuration: GPT 5.4 Mini is a strong default for agentic tasks that need to balance capability and cost. It handles code generation, tool orchestration, and multi-step browser interactions more reliably than previous mini-tier models.
  • Configuration: The model supports verbosity and reasoning level parameters, giving you control over response detail and how much the model reasons before answering.
  • Zero Data Retention: AI Gateway supports Zero Data Retention for this model via direct gateway requests (BYOK is not included). To configure this, check the documentation.
  • Authentication: AI Gateway authenticates requests using an API key or OIDC token. You do not need to manage provider credentials directly.

When to Use GPT 5.4 Mini

Best For

  • Agentic production workloads: Multi-step tasks involving tools, code, and browser interactions at sustainable cost
  • Code generation: Reliable code output for development tools and agent pipelines
  • Sub-agent coordination: Smaller model that coordinates on parts of a larger task alongside other agents
  • Tool orchestration: Calling and composing external APIs and functions in multi-step sequences
  • Cost-efficient chat: Capable conversational interface at a lower price than full GPT-5.4

Consider Alternatives When

  • Maximum capability: GPT-5.4 or GPT-5.4 pro when the task demands full GPT-5.4 quality
  • Lowest cost: GPT-5.4 nano for high-volume sub-agent workflows where cost scales with parallel calls
  • Specialized coding: GPT-5.3 codex for autonomous software engineering in sandboxed environments
  • Pure reasoning: O3 for chain-of-thought mathematical and scientific reasoning

Conclusion

GPT 5.4 Mini is the default production model in the GPT-5.4 family, balancing agentic capability and cost. For applications on AI Gateway that need reliable tool use and code generation at scale, it's the natural choice.

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.