OpenAI

Get an OpenAI API key

Usage

.env

OPENAI_API_KEY=

import { TokenJS } from 'token.js'

// Create the Token.js client
const tokenjs = new TokenJS()

async function main() {
  // Create a model response
  const completion = await tokenjs.chat.completions.create({
    // Specify the provider and model
    provider: 'openai',
    model: 'gpt-4o',
    // Define your message
    messages: [
      {
        role: 'user',
        content: 'Hello!',
      },
    ],
  })
  console.log(completion.choices[0])
}
main()

Supported Models

Model	Chat Completion	Streaming	JSON Output	Image Input	Function Calling	N > 1
gpt-4.5-preview	✅	✅	✅	✅	✅	✅
gpt-4.5-preview-2025-02-27	✅	✅	✅	✅	✅	✅
gpt-4.1	✅	✅	✅	✅	✅	✅
gpt-4.1-2025-04-14	✅	✅	✅	✅	✅	✅
gpt-4o	✅	✅	✅	✅	✅	✅
gpt-4o-mini	✅	✅	✅	✅	✅	✅
gpt-4o-2024-05-13	✅	✅	✅	✅	✅	✅
gpt-4o-2024-08-06	✅	✅	✅	✅	✅	✅
gpt-4-turbo	✅	✅	✅	✅	✅	✅
gpt-4-turbo-2024-04-09	✅	✅	✅	✅	✅	✅
gpt-4-0125-preview	✅	✅	✅	✅	✅	✅
gpt-4-turbo-preview	✅	✅	✅	✅	✅	✅
gpt-4-1106-preview	✅	✅	✅	✅	✅	✅
gpt-4-vision-preview	✅	✅	✅	✅	➖	✅
gpt-4	✅	✅	➖	➖	✅	✅
gpt-4-0314	✅	✅	➖	➖	➖	✅
gpt-4-0613	✅	✅	➖	➖	✅	✅
gpt-4-32k	✅	✅	➖	➖	➖	✅
gpt-4-32k-0314	✅	✅	➖	➖	➖	✅
gpt-4-32k-0613	✅	✅	➖	➖	➖	✅
gpt-3.5-turbo	✅	✅	✅	➖	✅	✅
gpt-3.5-turbo-16k	✅	✅	➖	➖	➖	✅
gpt-3.5-turbo-0301	✅	✅	➖	➖	➖	✅
gpt-3.5-turbo-0613	✅	✅	➖	➖	✅	✅
gpt-3.5-turbo-1106	✅	✅	✅	➖	✅	✅
gpt-3.5-turbo-0125	✅	✅	✅	➖	✅	✅
gpt-3.5-turbo-16k-0613	✅	✅	➖	➖	➖	✅
o3-mini	✅	✅	✅	➖	✅	✅
o1-mini	✅	➖	➖	➖	➖	✅
o1-mini-2024-09-12	✅	➖	➖	➖	➖	✅
o1-preview	✅	➖	➖	➖	➖	✅
o1-preview-2024-09-12	✅	➖	➖	➖	➖	✅

Legend

Symbol	Description
✅	Supported by Token.js
➖	Not supported by the LLM provider, so Token.js cannot support it

Additional Resources

• OpenAI Documentation