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Favicon for openai

OpenAI: GPT-5.4 Nano

openai/gpt-5.4-nano

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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.

Modalities
In / Out Price
$0.20 / $1.25per 1M
Context
400K
Released
Mar 17, 2026
Knowledge Cutoff
Aug 2025
Compare
ProvidersPricingPerformanceUptimeBenchmarksAppsActivityDocumentationFAQExplore

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), Floor (cheapest), or Exacto (highest tool-calling accuracy).

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for OpenAI: GPT-5.4 Nano (Artificial Analysis)
SourceBenchmarkScore
Artificial AnalysisGPT-5.4 nano (xhigh) Intelligence Index20.7
Artificial AnalysisGPT-5.4 nano (xhigh) Coding Index56.1
Artificial AnalysisGPT-5.4 nano (xhigh) Agentic Index16.0
Artificial AnalysisGPT-5.4 nano (xhigh) GPQA Diamond81.7%
Artificial AnalysisGPT-5.4 nano (xhigh) HLE28.3%
Artificial AnalysisGPT-5.4 nano (xhigh) IFBench75.9%
Artificial AnalysisGPT-5.4 nano (xhigh) τ²-Bench Telecom76.0%
Artificial AnalysisGPT-5.4 nano (xhigh) AA-LCR76.7%
Artificial AnalysisGPT-5.4 nano (xhigh) GDPval-AA21.8%
Artificial AnalysisGPT-5.4 nano (xhigh) CritPt9.3%
Artificial AnalysisGPT-5.4 nano (xhigh) SciCode47.2%
Artificial AnalysisGPT-5.4 nano (xhigh) Terminal-Bench Hard42.4%
Artificial AnalysisGPT-5.4 nano (xhigh) AA-Omniscience Accuracy25.7%
Artificial AnalysisGPT-5.4 nano (xhigh) AA-Omniscience Non-Hallucination Rate25.8%
Artificial AnalysisGPT-5.4 nano (Non-Reasoning) GPQA Diamond55.8%
Artificial AnalysisGPT-5.4 nano (Non-Reasoning) HLE4.1%
Artificial AnalysisGPT-5.4 nano (Non-Reasoning) IFBench32.7%
Artificial AnalysisGPT-5.4 nano (Non-Reasoning) τ²-Bench Telecom34.8%
Artificial AnalysisGPT-5.4 nano (Non-Reasoning) AA-LCR29.7%
Artificial AnalysisGPT-5.4 nano (Non-Reasoning) CritPt0.0%
Artificial AnalysisGPT-5.4 nano (Non-Reasoning) Terminal-Bench Hard24.2%
Artificial AnalysisGPT-5.4 nano (Non-Reasoning) AA-Omniscience Accuracy14.9%
Artificial AnalysisGPT-5.4 nano (Non-Reasoning) AA-Omniscience Non-Hallucination Rate38.5%
Artificial AnalysisGPT-5.4 nano (medium) GPQA Diamond76.1%
Artificial AnalysisGPT-5.4 nano (medium) HLE15.9%
Artificial AnalysisGPT-5.4 nano (medium) IFBench64.4%
Artificial AnalysisGPT-5.4 nano (medium) τ²-Bench Telecom52.6%
Artificial AnalysisGPT-5.4 nano (medium) AA-LCR67.3%
Artificial AnalysisGPT-5.4 nano (medium) CritPt5.1%
Artificial AnalysisGPT-5.4 nano (medium) Terminal-Bench Hard33.3%
Artificial AnalysisGPT-5.4 nano (medium) AA-Omniscience Accuracy21.9%
Artificial AnalysisGPT-5.4 nano (medium) AA-Omniscience Non-Hallucination Rate48.9%

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

API

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

Documentation

Guides, cookbooks, and tools for building with OpenAI: GPT-5.4 Nano on OpenRouter.

  • GPT-5.4 Migration GuideCookbook

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--
Throughput
55tok/s

P50, best across providers

Latency
1.02s

P50, best provider

AutoExacto benchmarks
GPQA DiamondTAU-Benchauto-routing78.1%67.3%Azure (US)77.8%64.7%OpenAI76.3%64.7%Azure76.4%62.7%
Uptime (3d)The model was reachable. Request routed to a provider.
100.00%
Availability (3d)The model returned inference from any provider. Errors and empty responses count against it.
99.49%

Availability over the last 3 days

Last 72 hours
Availability 99.49%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.41%
Without Routing
99.33%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.

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Frequently asked questions

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 GPT-5.4 Nano documentation on OpenRouter includes the GPT-5.4 Migration Guide cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.

GPT-5.4 Nano costs $0.20/M input tokens and $1.25/M output tokens, with separate rates for Cache Read at $0.02/M tokens.

GPT-5.4 Nano has a 400,000 token context window. It supports up to 128,000 completion tokens.

Yes. GPT-5.4 Nano accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

GPT-5.4 Nano accepts files such as PDFs, images, and text as input and returns text.

GPT-5.4 Nano is served by 2 providers on OpenRouter: OpenAI and Azure. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

GPT-5.4 Nano was released on March 17, 2026. Its knowledge cutoff is August 31, 2025.

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