All Models

OpenAI GPT-5 Nano

gpt-nano Reasoning Tool Calling Attachments

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. It is the successor to GPT-4.1-nano and offers a lightweight option for cost-sensitive or real-time applications.

Providers 2
Released Jan 1, 2025
Input Modalities text, image, pdf
Output Modalities text
Tarsk Use coding

Benchmarks

26.8
Intelligence Index
20.3
Coding Index
83.7
Math Index

Available Providers (2)

Provider Model ID Input Cost Output Cost Context Max Output Docs
Helicone gpt-5-nano $0.05/MTok $0.40/MTok 400K 128K
Kilo Gateway openai/gpt-5-nano $0.05/MTok $0.40/MTok 400K 128K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output