GPT-5 Nano

Ultra-efficient GPT-5 variant for high-volume applications with reasoning support.

gpt-5-nano
STABLEScheduled for DeactivationGet StartedView uptime
400,000 context
Released August 1, 2025
Starting at $0.05/M input tokens
Starting at $0.40/M output tokens
Streaming
Tools
Reasoning
JSON Output
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Select Provider

All Providers for GPT-5 Nano

LLM Gateway routes requests to the best providers that are able to handle your prompt size and parameters.

OpenAI
Context: 400k
Deactivating on Dec 10, 2026
Input
$0.05
/M tokens
Cache Read
$0.005
/M tokens
Output
$0.4
/M tokens
+ $0.010 per search
Get Started
Azure
Context: 400k
Deactivating on Dec 10, 2026
Input
$0.05
/M tokens
Cache Read
$0.005
/M tokens
Output
$0.4
/M tokens
Get Started

Frequently asked questions

What is GPT-5 Nano?

Ultra-efficient GPT-5 variant for high-volume applications with reasoning support. You can access it through LLM Gateway's OpenAI-compatible API with automatic provider routing, fallback, and cost analytics.

How much does GPT-5 Nano cost?

Pricing for GPT-5 Nano on LLM Gateway starts at $0.05 per million input tokens and $0.40 per million output tokens, depending on the provider. The pricing table above always reflects the current per-provider rates.

What is the context length of GPT-5 Nano?

GPT-5 Nano supports a context window of up to 400,000 tokens on its largest provider deployment.

Which providers serve GPT-5 Nano?

GPT-5 Nano is served by OpenAI, Azure through LLM Gateway. Requests are automatically routed to the best available provider, with fallback when a provider has issues.

Does GPT-5 Nano support tool calling and structured outputs?

Yes. GPT-5 Nano supports both tool (function) calling and structured JSON outputs through LLM Gateway.

When was GPT-5 Nano released?

GPT-5 Nano was released on August 1, 2025.