Context Length
400K
Max Output
128K
Published
March 17, 2026
Knowledge Cutoff
August 31, 2025
Model / Completion Ratio
0.1 / 6.25
GPT-5.4 nano is designed for tasks where speed and cost matter most like classification, data extraction, ranking, and sub-agents.
Different token groups have different prices. Unit: Million tokens (M)
/v1/chat/completions
/v1/responses