LLM prices per 1M tokens

264 models · 161 price changes

GPT-5.4 Nano

OpenAI · Reasoning · 400K context · released Mar 17, 2026 · checked 13h ago

GPT-5.4 nano is the most lightweight and cost-efficient variant of the GPT-5.4 family, optimized for speed-critical and high-volume tasks.

Ways to buy 4

Way to buyIn / out per 1M
OpenAI
flex, cheapest · cached $0.01
$0.1 / $0.625-50% vs list
OpenAI API
The lab's own API · cached $0.02
$0.2 / $1.25List price
Azure AI Foundry
Default region · cached $0.02
$0.2 / $1.25Same as list
Azure AI Foundry
us · cached $0.022
$0.22 / $1.38+10% vs list

USD per 1M tokens; batch $0.1 in, $0.625 out on the lab's API. Regions are separate routes.

Through a gateway

Your own numbers

100M input and 20M output tokens a month: $45.00 direct.

A dash: not on that gateway's own model list. No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.

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About GPT-5.4 Nano

Takes files, image, text in and returns text. First listed Mar 19, 2026. Up to 128K output tokens. Blended price $0.463 per 1M tokens at 3 input to 1 output. Model id gpt-5-4-nano.

Price history

$0.3$1Mar 19, 2026Output $1.25Input $0.2

List price since Mar 19, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.

Questions

How much does GPT-5.4 Nano cost?

$0.2 per million input tokens and $1.25 per million output tokens, with cached input at $0.02, or $0.1 and $0.625 through the Batch API.

What is the context window of GPT-5.4 Nano?

400K tokens, with up to 128K tokens of output.

Where is GPT-5.4 Nano cheapest?

Of 4 routes tracked, OpenAI is cheapest at $0.1 input and $0.625 output per million tokens.