OpenAI: GPT-5.4 Nano

openai/gpt-5.4-nano

Released Mar 17, 2026400,000 context

$0.20/M input tokens$1.25/M output tokens$10/K web search

GPT-5.4 nano is the most lightweight and cost-efficient variant of the GPT-5.4 family, optimized for speed-critical and high-volume tasks. It supports text and image inputs and is designed for low-latency use cases such as classification, data extraction, ranking, and sub-agent execution.

The model prioritizes responsiveness and efficiency over deep reasoning, making it ideal for pipelines that require fast, reliable outputs at scale. GPT-5.4 nano is well suited for background tasks, real-time systems, and distributed agent architectures where minimizing cost and latency is essential.

Providers for GPT-5.4 Nano

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for GPT-5.4 Nano

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Effective Pricing for GPT-5.4 Nano

Actual cost per million tokens across providers over the past hour

Apps using GPT-5.4 Nano

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Recent activity on GPT-5.4 Nano

Total usage per day on OpenRouter

Prompt

2.45B

Completion

115M

Reasoning

21.8M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Uptime stats for GPT-5.4 Nano

Uptime stats for GPT-5.4 Nano across all providers

Sample code and API for GPT-5.4 Nano

OpenRouter normalizes requests and responses across providers for you.

OpenRouter supports reasoning-enabled models that can show their step-by-step thinking process. Use the reasoning parameter in your request to enable reasoning, and access the reasoning_details array in the response to see the model's internal reasoning before the final answer. When continuing a conversation, preserve the complete reasoning_details when passing messages back to the model so it can continue reasoning from where it left off. Learn more about reasoning tokens.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.

GPT-5.4 Nano - API Pricing & Providers | OpenRouter