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gpt-5.4-nano API pricing & access

gpt-5.4-nano API pricing: $0.2 per 1M tokens. gpt-5.4-nano. Supports text, image input and text output. Listed specifications follow pub…

gpt-5.4-nano API access

gpt-5.4-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-5.4-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-5.4-nano API pricing

Base input price: $0.2 per 1M tokens
Base output price: $1.25 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-5.4-nano

gpt-5.4-nano is the small GPT-5.4 version for straightforward high-frequency work such as classification, data extraction and ranking. It accepts text and images and returns text; evaluate it on tightly scoped business tasks.

Reasoning effort runs from none through xhigh, defaulting to none. Validate structured data and tool arguments, and use fixed candidates and explicit criteria for ranking rather than judging success by a plausible-looking answer.

Official reference, checked 2026-10-14.

Use cases and prompting

Give a positive and negative example for each label and inspect boundary errors.
Specify types, units and null rules and validate required fields.
Supply candidate IDs and ranking criteria and require complete, duplicate-free results.
Compare the same test cases with gpt-5.4-mini; check request and response formats in the API documentation.

How to call gpt-5.4-nano

gpt-5.4-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-5.4-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-5.4-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-5.4-nano",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}],
)
print(message.content[0].text)

Frequently asked questions about gpt-5.4-nano

What is gpt-5.4-nano?

gpt-5.4-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-5.4-nano?

Create an API key with access to gpt-5.4-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-5.4-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-5.4-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-5.4-nano?

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

How should I evaluate gpt-5.4-nano for my project?

Start with the use cases and prompting guidance on this page, then evaluate the model with representative inputs from your project.

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