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.

What is the context length of GPT 5 Nano?

GPT 5 Nano has a recorded input context length of 400,000 tokens.

What providers serve GPT 5 Nano, and can I use it via API?

GPT 5 Nano is available through the Phaseo API, with 2 active providers currently recorded. Recorded providers include Abacus, Azure, DigitalOcean, FastRouter, Inference, Kilo Gateway, Merge Gateway, and NanoGPT and 8 more.

Does GPT 5 Nano support tool calling?

Yes. At least one active provider route for GPT 5 Nano currently advertises tool calling support. Provider support can vary, so requests are routed only to compatible routes.

Does GPT 5 Nano support structured outputs?

Yes. At least one active provider route for GPT 5 Nano currently advertises structured outputs support. Provider support can vary, so requests are routed only to compatible routes.

GPT 5 Nano API Pricing — Compare 16 Providers

Providers

API providers, route pricing, availability, and recent reliability signals.

Performance

Latency, throughput, and reliability signals from recent traffic.

Pricing

Effective prices over the last 30 days, with current provider list prices for context.

Benchmarks

Activity

Daily gateway activity over the last 30 days, with current UTC-day pace projection.

Apps Using This Model

Public apps observed in gateway usage for this model.

Model Uptime

Uptime trend for this model over the last 24 hours.

About

Key dates, capabilities, and model metadata.

Subscriptions

Commercial plans and bundled access that currently include this model.

GPT 5 Nano API Pricing — Compare 16 Providers | Phaseo

Providers

API providers, route pricing, availability, and recent reliability signals.


OpenAI(Standard)	$0.05	$0.4	$0.005	--	--	--

Azure	$0.05	$0.4	$0.01	--	--	--

DigitalOcean	$0.05	$0.4	$0.005	--	--	--

OpenAI (EU)	--	--	--	--	--	--

Performance

Hourly latency and throughput from the past seven days.

No gateway telemetry in the past 7 days

Hourly charts will appear when this model processes gateway traffic in the selected location.

Pricing

Weighted provider pricing over the last 30 days, with recent route pricing history below.

Effective pricing

Weighted by observed usage over the last 30 days. Every provider with recorded pricing is included.

Weighted input price

Per 1M tokens

Weighted output price

Per 1M tokens

Price history

USD per 1M tokens · 30-day rolling effective prices · exact UTC list changes


OpenAI	--	--	$0.05	$0.4	0.0%
Azure	--	--	$0.05	$0.4	--
DigitalOcean	--	--	$0.05	$0.4	--
OpenAI (EU)	--	--	--	--	--

Benchmarks

Artificial Analysis

Independent evaluations · Index v4.3

Model configuration

View full leaderboard Source: Artificial Analysis

Apps Using This Model

Public apps observed in gateway usage for this model.

AI Stats Chat

ai-stats.phaseo.app

205.7K tokens

AI Stats

ai-stats.phaseo.app

5.5K tokens

AI Stats local streamed tool-call smoke

localhost.localtest

2.5K tokens

Apps Using This Model

Public apps observed in gateway usage for this model.

Model Uptime

Uptime trend for this model over the last 24 hours.

100.0%

Last 24 hours

No requests observed

Uptime per hour

About

Key dates, capabilities, and model metadata.

Announcement

07 Aug 2025·13 months ago

Release

07 Aug 2025·13 months ago

Deprecation

11 Jun 2026·3 months ago

Retirement

11 Dec 2026·In 3 months

Parameters

Not listed

License

Proprietary

Training Tokens

Not listed

Input

TextImage

Output

Text

Related models

Previous model

GPT 4 1 Nano

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Providers

Performance

Pricing

Benchmarks

Activity

Apps Using This Model

Model Uptime

About

Subscriptions

Providers

Performance

Pricing

Benchmarks

Activity

Apps Using This Model

Model Uptime

About

Subscriptions

OpenAI: GPT 5 Nano

Providers

Performance