OpenAI: GPT-5 Nano

2 providers live

openai/gpt-5-nano

→

2 live providers
100% uptime
2.48 s first token
161 tok/s output
10% off

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 counterparts, it retains key instruction-following and safety features. It is the successor to GPT-4.1-nano and offers a lightweight option for cost-sensitive or real-time applications.

Context: 400K; tokens
Max output: 128K; tokens
Input: ~~$0.05~~ $0.045; per million tokens, 10% off
Output: ~~$0.40~~ $0.36; per million tokens, 10% off

Providers

Ranked by price and speed. Requests go to the best healthy provider, then fail over down the list.Benchmarks

Live providers of GPT-5 Nano, in the router's order
Who answers now	Input per 1M	First token
llm.buzz10% offpicked	~~$0.05~~ $0.045	--
OpenAI	$0.05	2.48 s

llm.buzz answers now: lowest price.

First token is the 24-hour median. If the pick fails, the next one answers at its own price.

#	Provider	Input	Output	Cache read	Latency	Throughput	Uptime (3d)
1	llm.buzzAuto10% offNon-EU Data policy not declared	~~$0.05~~ $0.045	~~$0.40~~ $0.36	~~$0.005~~ $0.0045	n/a	n/a	94.4%
2	OpenAINon-EU Data policy not declared	$0.05	$0.40	$0.005	2.48 s	161 tok/s	100%

n/a: not enough traffic to show yet.

Want to serve this model?Become a provider

Price history

No price changes since Oct 22, 2026. The history shows prices before discounts.

OpenAI$0.05 in, $0.40 out

Performance

Last 24 hours, from llm.buzz's test requests

Throughput (tok/s)

OpenAI161 tok/s

Data table

Provider	From (UTC)	p50	p90	p99
OpenAI	Oct 26, 15:00	93 tok/s	93 tok/s	93 tok/s
OpenAI	Oct 27, 00:00	161 tok/s	161 tok/s	161 tok/s
OpenAI	Last 24 hours	161 tok/s	93 tok/s	93 tok/s

Latency (time to first token)

OpenAI2.48 s

Data table

Provider	From (UTC)	p50	p90	p99
OpenAI	Oct 26, 15:00	2.48 s	2.48 s	2.48 s
OpenAI	Oct 27, 00:00	2.48 s	2.48 s	2.48 s
OpenAI	Last 24 hours	2.48 s	2.48 s	2.48 s

Uptime

Last 72 hours, by hour

Best provider 100%

This model

llm.buzz

OpenAI

Up: 95% or more served
Degraded: 85% to 95%
Down: below 85%
No data
From llm.buzz's test requests

Questions

How much does OpenAI: GPT-5 Nano cost?

OpenAI: GPT-5 Nano costs $0.045 per million input tokens and $0.36 per million output tokens at llm.buzz, the provider requests go to first, with cache reads at $0.0045 per million tokens. These prices are 10% off until 2026-11-06 00:00 UTC. Each provider sets its own price, and you pay the price of the provider that answered.

Do providers train on my prompts?

Each provider declares it, and the table above shows every declaration. You can limit a request to providers that keep nothing, or to providers in the EU.

Can I serve OpenAI: GPT-5 Nano myself?

Yes. Apply as a provider, add your endpoint and list this model at your price. It goes live once the automated check passes.

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Call it

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.llm.buzz/api/v1",
    api_key=os.environ["LLM_BUZZ_KEY"],
)
reply = client.chat.completions.create(
    model="openai/gpt-5-nano",
    messages=[{"role": "user", "content": "Hello"}],
)

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.llm.buzz/api/v1",
  apiKey: process.env.LLM_BUZZ_KEY,
});
const reply = await client.chat.completions.create({
  model: "openai/gpt-5-nano",
  messages: [{ role: "user", content: "Hello" }],
});

curl https://api.llm.buzz/api/v1/chat/completions \
  -H "Authorization: Bearer $LLM_BUZZ_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "openai/gpt-5-nano",
       "messages": [{"role": "user", "content": "Hello"}]}'

Endpoints

POST /api/v1/chat/completionsPOST /api/v1/responsesPOST /api/v1/messages

Authentication

Send your llm.buzz key as a Bearer token: Authorization: Bearer $LLM_BUZZ_KEY. Create keys in the console. The same key calls every model; each request pays the price of the provider that answered it.

More in Authentication and the API reference.

Call OpenAI: GPT-5 Nano with one keyEach request pays the price of the provider that answered it.

Get API key