GPT-5 Nano

openai/gpt-5-nano

GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger...

InputFileImageText
OutputText
Input / Outputclub$0.053 / $0.424per 1M tokens · USD
Context window400Ktoken
Maximum output128Ktoken

Pricing

Current model usage rates. Choose your plan to see its published prices.

Pricing
UsagePricing
InputUS$0.053/ 1M token
Cache readUS$0.0053/ 1M token
OutputUS$0.424/ 1M token

Membership and model usage are billed separately. Compare plans

Capabilities

Input
FileImageText
Output
Text
Context window
400,000 token
Maximum output
128,000 token
Reasoning
high · medium · low · minimal

Providers

Model supply available through Vecbase.

Via OpenRouter

Access is subject to your account’s permissions and model availability.

Frequently asked questions

What is GPT-5 Nano, and who develops it?

GPT-5 Nano is a model from OpenAI. Its model ID on Vecbase is openai/gpt-5-nano. GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger...

How much does GPT-5 Nano cost on Vecbase?

For GPT-5 Nano, the Club plan lists USD 0.053 per 1 million input tokens and USD 0.424 per 1 million output tokens, as of 10/22/2026, 10:16:00 PM UTC. See the pricing table for cache rates, input-length tiers and other usage types. Membership fees are separate.

How many tokens fit in GPT-5 Nano’s context window?

GPT-5 Nano has a context window of 400,000 tokens. Input and output must fit within the limits of the API you use.

What is the maximum output length for GPT-5 Nano?

GPT-5 Nano can generate up to 128,000 tokens per response. Your API or request settings may set a lower limit.

Can GPT-5 Nano call tools in an agent workflow?

Yes. GPT-5 Nano supports tool calling. Your application provides the tool definitions and runs the tools the model requests.

Does GPT-5 Nano support structured outputs?

Yes. GPT-5 Nano supports structured output. Set the required format in your API request and check the returned data before using it.

Which input and output formats does GPT-5 Nano support?

GPT-5 Nano accepts File, Image, and Text and produces Text.

Which providers make GPT-5 Nano available through Vecbase?

Vecbase offers GPT-5 Nano through OpenRouter. Availability may vary by provider.

Which model ID should an agent use to request GPT-5 Nano?

Use openai/gpt-5-nano as the model identifier for GPT-5 Nano. See Vecbase’s API documentation for authentication, required inputs and supported request formats.

Which reasoning settings are listed for GPT-5 Nano?

GPT-5 Nano supports these reasoning levels: high, medium, low, and minimal. Available options depend on your API.

What does an agent need to access GPT-5 Nano through Vecbase?

To use GPT-5 Nano, you need an authenticated account with the required permissions, sufficient balance and the relevant capability enabled. See the documentation for setup.

Is a release date available for GPT-5 Nano?

We do not yet have a confirmed release date for GPT-5 Nano.

Which models can I compare with GPT-5 Nano on Vecbase?

You can compare GPT-5 Nano with GPT Mini Latest (openai/gpt-mini-latest), GPT-5.5 (openai/gpt-5.5), and GPT-5.6 Luna (openai/gpt-5.6-luna). Check their capabilities and prices to find the best fit for your task.