GPT 5 Nano
OpenAI
openai/gpt-5-nano
200K context, vision
Context Window
200K
200,000 tokens
Max Output
33K
32,768 tokens
About this model
GPT-5 Nano β ultra-fast and cheapest GPT-5 variant
This model supports up to 200K tokens of context. It includes native vision understanding for analyzing images and documents. It provides strong code generation and debugging capabilities.
Access it through Chuizi.AI with a single ck- API key β no separate OpenAI account needed.
Highlights
200K context window
33K max output
Native vision support
Strong code generation
Best For
Code generationRefactoringDebuggingDocumentation
2025-08-07
Capabilities
ChatVisionCodetoolscache
Aliases
gpt-5-nanoPricing (per 1M tokens)
| Pricing (per 1M tokens) | / 1M tokens |
|---|---|
| Input / 1M | $0.05 |
| Output / 1M | $0.42 |
| Cache Read | $0.0053 |
Final prices shown
Quick Start
main.py
from openai import OpenAI client = OpenAI( base_url="https://api.chuizi.ai/v1", api_key="ck-your-key-here", ) response = client.chat.completions.create( model="openai/gpt-5-nano", messages=[{"role": "user", "content": "Hello!"}], ) print(response.choices[0].message.content)