gpt-5.5

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Playground

System

User message

Temperature

Max tokens

Stream

The assistant reply will appear after you run.

Examples

Click an example to load Playground presets and jump to the trial area.

How to start

Three steps to integrate. Model ID is gpt-5.5.

1

Get an API key

Create a key in the 2KEN console. Text, image, and video share one key.
2

Point to the unified endpoint

Set Base URL to https://api.2ken.com/v1 and model to gpt-5.5.
3

Send Chat Completions

Submit a messages array with system / user, then read choices and usage.

Developer docs

API

OpenAI-compatible sync API. One request returns the assistant reply and token usage.

OpenAI · Chat API

gpt-5.5 Chat Completions

Call gpt-5.5 via the OpenAI-compatible chat endpoint. One request returns the assistant message and usage.

Endpoint

POST

Chat Completions/v1/chat/completions

Try

Flow

1
Bearer auth
Send Authorization: Bearer .
2
Submit messages
Read choices[0].message and usage.

Notes

Modelgpt-5.5
CompatReuse an OpenAI SDK by switching the base URL.

curl --request POST \
  --url https://api.2ken.com/v1/chat/completions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-5.5",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

const res = await fetch("https://api.2ken.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.TWO_KEN_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "gpt-5.5",
    messages: [{ role: "user", content: "Hello" }],
  }),
});

const data = await res.json();
console.log(data.choices[0].message.content);

import os
import requests

resp = requests.post(
    "https://api.2ken.com/v1/chat/completions",
    headers={"Authorization": f"Bearer {os.environ['TWO_KEN_API_KEY']}"},
    json={
        "model": "gpt-5.5",
        "messages": [{"role": "user", "content": "Hello"}],
    },
)
print(resp.json()["choices"][0]["message"]["content"])

200Chat Response

{
  "id": "chatcmpl-demo",
  "choices": [{"message": {"role": "assistant", "content": "Hello from 2KEN."}}],
  "usage": {"prompt_tokens": 8, "completion_tokens": 6}
}