GPT-5 Nano

Name: GPT-5 Nano
Brand: openai
SKU: openai/gpt-5-nano
Price: 0.053 USD
Availability: InStock

openai/gpt-5-nano

text, image, document in · text out · 400,000 context · 128,000 max output

toolsschemavisionreasoningcacheno-trainShow prices also in

Effective cost per 1k requestsInput tokens 2,000Output tokens 500Cached share 50%

cost = p_in·(input − cached) + p_cache_read·cached + p_out·output + p_req; cached tokens are the prefix a sticky endpoint already holds (part2b §9.3), which is why the cheapest list price is not always the cheapest request.

Provider	Region · quant	Context / max out	Input / M	Output / M	Cache read / write	Markup	Per 1k req	Uptime 30 d	TTFT p50 / p95	Throughput	Last 24 h	Fidelity	Data	Capabilities	Status
OpenRouter	global · unknown	400,000 / 128,000	$0.053	$0.420	$0.005 / —	+5.0%	$0.268	—	—	—	no traffic	—	no-train 30 d	model default	active

Quick start

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

Get a key in the console

Changelog

new_model model openai/gpt-5-nano added (active); endpoint ep_openrouter_gpt-5-nano_global (openai/gpt-5-nano) added as active; price input 0.053 output 0.420 USD/M 10/5/2026