GPT-5.4 mini
OpenAI · released 2026 · proprietary API
Cost-efficient mid-tier for high-volume tasks with solid reasoning.
Context window
400K
400,000 tokens
Input price
$0.75
per 1M tokens
Output price
$4.50
per 1M tokens
Blended
$1.69
3:1 in:out mix
Weights
Proprietary
API only
Released
2026
OpenAI
Where it ranks
Of the 16 models tracked, GPT-5.4 mini is #6 cheapest to run (blended $/1M at a 3:1 input:output mix), #5 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.