GPT-5.4 nano
ProprietaryMultimodal
About
Ultra-efficient nano variant of GPT-5.4 for high-throughput, speed-optimized inference. Most cost-efficient GPT-5.4 model at $0.20 input / $1.25 output per 1M tokens. Released March 18, 2026.
Capabilities
MultimodalFunction CallingTool UseJSON Mode