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NanoGPT

GPT 5 Nano API

NanoGPT
About

Build advanced reasoning agents with GPT 5 Nano, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.05/1M input and $0.40/1M output tokens. Access GPT 5 Nano via the NanoGPT API with up to 128K output tokens.

Capabilities

Input Modalities

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Output Modalities

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Reasoning
Yes
Structured Output
No
Tool Use
No
WeightsClosed
Temperature
Fixed
Attachment
Supported
Limits
Context Window
400K

Tokens

Input Limit
400K

Tokens

Max Output
128K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.05
Output
$0.40
Frequently Asked Questions

GPT 5 Nano by NanoGPT costs $0.05 per 1M input tokens and $0.40 per 1M output tokens.

Model Details
ID
openai/gpt-5-nano
Provider
NanoGPT
Family
gpt-nano
Release Date
Aug 7, 2025
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
NANO_GPT_API_KEY
API Base URL
https://nano-gpt.com/api/v1
Documentation