gpt-5-nano
completions
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.
Input:$0.05 / 1M tokens•<$0.01 / 1M tokenscached
Output:$0.4 / 1M tokens
Context:400K tokens
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Category Rankings
programming#15
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Model Parameters
15 availablefrequency_penalty
-202
include_reasoning
logit_bias
logprobs
max_tokens
presence_penalty
-201.999
response_format
seed
stop
structured_outputs
temperature
012
tool_choice
tools
top_logprobs
top_p
011
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