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gpt-5.5 API pricing & access

gpt-5.5 API pricing: $5 per 1M tokens. gpt-5.5. Supports text, image input and text output. Listed specifications follow public v…

gpt-5.5 API access

gpt-5.5. 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-5.5 through the unified API gateway.

Category
text
Context length
1050000 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-5.5 API pricing

Base input price
$5 per 1M tokens
Base output price
$30 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-5.5

GPT-5.5 is designed for complex professional work and coding. It can be evaluated for project analysis, evidence synthesis and implementation planning. Official text and image inputs produce text; judge results on tasks with explicit constraints rather than a general capability label.

Official reasoning levels are none, low, medium, high and xhigh; do not copy a max setting from another GPT model. Check tools, image handling and structured output against the compatible interface and route listed here. Compare costs using this site’s prices and actual usage.

Official reference, checked 2026-10-14.

Use cases and prompting

  1. Supply sources, questions and a citation format for analysis. Ask the model to identify gaps in the evidence.
  2. Pair coding objectives with acceptance examples. Review the plan before validating generated changes.
  3. Compare effort levels accepted by the selected interface. GPT-5.5 does not use max, so inspect inherited parameters when migrating.
  4. Compare the same samples with GPT-5.6 Sol and GPT-5.4. See the documentation for integration and usage accounting.

How to call gpt-5.5

gpt-5.5 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-5.5", "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-5.5",
    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-5.5",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}],
)
print(message.content[0].text)

Frequently asked questions about gpt-5.5

What is gpt-5.5?

gpt-5.5. 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-5.5?

Create an API key with access to gpt-5.5, 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-5.5 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-5.5?

The model catalog lists a context window of 1050000 tokens. Check the selected endpoint for request limits.

What is the maximum output of gpt-5.5?

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

How should I evaluate gpt-5.5 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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