GPT-5-NANO
GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger counterparts, it retains key instruction-following and safety features.
Input
Output
Context
400K
Max Output
128K
Parameters
—
Technical Specifications
Model TypeChat
Context Window400K
Max Output Tokens128K
Parameters—
Training Cutoff—
Licenseproprietary
Capabilities
Input Modalities
textimagefile
Output Modalities
text
Features
code_generationfunction_callingjson_modereasoningstreamingsystem_promptstext_generationvision
Benchmarks
8.2%
HLE
67.6%
GPQA
36.6%
SciCode
78.0%
MMLU Pro
83.7
Math
20.3
Coding
78.9%
LiveCodeBench
26.8
Intelligence
151
Speed (tok/s)
80.2
TTFA (s)
80.2
TTFT (s)
Resources & Links
proprietary — Proprietary - API access only
Related Tools
Data sourced from official provider APIs and documentation
Last updated: May 5, 2026
Start building with the right model.
From model selection to production, one platform, no fragmentation.