Last refreshed 2026-05-10. Next refresh: weekly.
Why use GPT-5 Nano on OpenAI API?
OpenAI API offers GPT-5 Nano with pay-as-you-go pricing at $0.05/1M input tokens. OpenAI is a leading AI research and deployment company dedicated to developing safe and beneficial artificial general intelligence (AGI) for humanity.
Compare GPT-5 Nano across 4 providers to find the best fit for your use caseInput / 1M
$0.050
Output / 1M
$0.40
Cache
read $0.005
Batch
-50% · in $0.025 / out $0.20
Setup recipe
Python + curlInstall
pip install openaiAuth
export OPENAI_API_KEY=...Call
import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(Model ID
gpt-5-nanoRequest example
import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(
model="gpt-5-nano",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use the model slug directly, e.g. "gpt-4o" or "gpt-4.1-mini".
- The examples expect OPENAI_API_KEY; rename it only if your application config maps the new variable.
Compare GPT-5 Nano Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Replicate API | $0.05 | $0.40 |
| OpenRouter | $0.05 | $0.40 |
| OpenAI API | $0.05 | $0.40 |
| Vercel AI Gateway | $0.05 | $0.40 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.05 |
| Output tokens | $0.40 |
Capabilities
VisionMultimodalReasoningJSON / Tool useStructured OutputsCode ExecutionPrompt CachingBatch API
About GPT-5 Nano
Fastest, cheapest GPT-5 variant for summarization and classification tasks. Also available via Realtime API.
Get Started
Model Specs
Released2025-08-07
Context400k
ArchitectureDecoder Only
Knowledge cutoff2024-05