← All models
OpenAI: GPT-5 Nano
openai/gpt-5-nano
VisionTool useJSONReasoningStreaming
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...
Pricing
Input
$0.05 / 1M
Output
$0.4 / 1M
Specs
Context
400,000 tokens
Input
text, image, file
Output
text
Knowledge cutoff: 2024-05-31
Released: 2025-08
Supported parameters
include_reasoningmax_completion_tokensmax_tokensreasoningresponse_formatseedstructured_outputstool_choicetools