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gpt-5-nano API pricing & access

gpt-5-nano API pricing: $0.05 per 1M tokens. gpt-5-nano. Supports text, image input and text output. Listed specifications follow publi…

gpt-5-nano API access

gpt-5-nano. Supports text, image input and text output. Listed specifications follow public vendor documentation. Available features and limits depend on the selected serving channel.

Compare supported API endpoints and capabilities, then access gpt-5-nano through the unified API gateway.

Category
text
Context length
400000 tokens
Maximum output
128000 tokens
Supported APIs
OpenAI Chat Completions API, Anthropic Messages API
API endpoints
POST /v1/chat/completions, POST /v1/messages
Input modalities
text, image
Output modalities
text
Capabilities
streaming, structured output, function calling, vision, caching, reasoning

gpt-5-nano API pricing

Base input price
$0.05 per 1M tokens
Base output price
$0.4 per 1M tokens

Base prices are shown in USD before group-specific adjustments. Open the live pricing page for current access-group prices.

About gpt-5-nano

gpt-5-nano. Supports text, image input and text output. Listed specifications follow public vendor documentation. Available features and limits depend on the selected serving channel.

Use cases and prompting

Use cases to explore

  • Draft and revise text with explicit audience, tone and format requirements.
  • Summarize supplied documents and compare answers against the original sources.

Practical tips

Separate instructions from source material, describe the desired output and provide an example. Test tool use or structured output only when listed as supported.

Example prompt

Summarize the following document in five bullet points. Separate confirmed facts from open questions, cite the relevant passages and do not invent missing information. Document: [paste your text]

How to call gpt-5-nano

gpt-5-nano is served through tbuy's unified gateway. Existing OpenAI or Anthropic SDK code keeps working: point base_url at https://modelsok.com and use your tbuy API key.

curl (OpenAI-compatible)

curl https://modelsok.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "gpt-5-nano", "messages": [{"role": "user", "content": "Hello"}]}'

Python (openai SDK)

from openai import OpenAI

client = OpenAI(base_url="https://modelsok.com/v1", api_key="YOUR_API_KEY")
response = client.chat.completions.create(
    model="gpt-5-nano",
    messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)

Python (anthropic SDK)

from anthropic import Anthropic

client = Anthropic(base_url="https://modelsok.com", api_key="YOUR_API_KEY")
message = client.messages.create(
    model="gpt-5-nano",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}],
)
print(message.content[0].text)

Frequently asked questions about gpt-5-nano

What is gpt-5-nano?

gpt-5-nano. Supports text, image input and text output. Listed specifications follow public vendor documentation. Available features and limits depend on the selected serving channel.

How do I call gpt-5-nano?

Create an API key with access to gpt-5-nano, then use the exact model ID and a supported endpoint from the API access section. Request fields depend on the selected endpoint.

How is gpt-5-nano priced?

Pricing depends on the selected provider group and the model billing unit. Refer to the current input, output, request, or media prices in the pricing section.

What is the context window of gpt-5-nano?

The model catalog lists a context window of 400000 tokens. Check the selected endpoint for request limits.

What is the maximum output of gpt-5-nano?

The model catalog lists a maximum output of 128000 tokens. Your request settings may set a lower limit.

How should I evaluate gpt-5-nano for my project?

Separate instructions from source material, describe the desired output and provide an example. Test tool use or structured output only when listed as supported.

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