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GPT-5.4 nano

OpenAI · released 2026 · proprietary API

Cheapest OpenAI tier for simple, latency-sensitive, high-volume calls.

Context window

400K

400,000 tokens

Input price

$0.20

per 1M tokens

Output price

$1.25

per 1M tokens

Blended

$0.46

3:1 in:out mix

Weights

Proprietary

API only

Released

2026

OpenAI

Where it ranks

Of the 16 models tracked, GPT-5.4 nano is #2 cheapest to run (blended $/1M at a 3:1 input:output mix), #1 by input price, and #11 (tied) by context window.

See the full Frontier Index →

Compare with

The nearest models by blended cost to run.

Put it to work

Specs from BitByteCore's hand-verified Frontier Ledger (v2026-07-04, verified 21 Jun 2026). Model pricing moves fast — confirm with OpenAI before you rely on a figure.