Portkey provides a robust and secure gateway to facilitate the integration of various Large Language Models (LLMs) into your applications, including Lepton AI APIs. With Portkey, you can take advantage of features like fast AI gateway access, observability, prompt management, and more, all while ensuring the secure management of your LLM API keys through a virtual key system.
Provider Slug. lepton

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Portkey SDK Integration with Lepton AI Models

Portkey provides a consistent API to interact with models from various providers. To integrate Lepton AI with Portkey:

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1. Install the Portkey SDK

Add the Portkey SDK to your application to interact with Lepton AI’s API through Portkey’s gateway. 
npm install --save portkey-ai

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2. Initialize Portkey with the Virtual Key

To use Lepton AI with Portkey, get your API key from Lepton AI, then add it to Portkey to create the virtual key. 
import Portkey from 'portkey-ai'

const portkey = new Portkey({
    apiKey: "PORTKEY_API_KEY", // defaults to process.env["PORTKEY_API_KEY"]
    virtualKey: "VIRTUAL_KEY" // Your Lepton AI Virtual Key
})

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3. Invoke Chat Completions with Lepton AI

Use the Portkey instance to send requests to Lepton AI. You can also override the virtual key directly in the API call if needed. 
const chatCompletion = await portkey.chat.completions.create({
    messages: [{ role: 'user', content: 'Say this is a test' }],
    model: 'llama-3-8b-sft-v1',
});

console.log(chatCompletion.choices);

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Speech-to-Text (Transcription)

Lepton AI provides speech-to-text capabilities through Portkey’s unified API: 
import fs from 'fs';

const transcription = await portkey.audio.transcriptions.create({
    file: fs.createReadStream('audio.mp3'),
    model: 'whisper-large-v3',
});

console.log(transcription.text);

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Advanced Features

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Streaming Responses

Lepton AI supports streaming responses to provide real-time generation: 
const stream = await portkey.chat.completions.create({
    messages: [{ role: 'user', content: 'Write a story about a robot' }],
    model: 'llama-3-8b-sft-v1',
    stream: true,
});

for await (const chunk of stream) {
    process.stdout.write(chunk.choices[0]?.delta?.content || '');
}

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Managing Lepton AI Prompts

You can manage all prompts to Lepton AI in the Prompt Library. All the current models of Lepton AI are supported and you can easily start testing different prompts. Once you’re ready with your prompt, you can use the portkey.prompts.completions.create interface to use the prompt in your application.

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Next Steps

The complete list of features supported in the SDK are available on the link below.

SDK

 You’ll find more information in the relevant sections:
  1. Add metadata to your requests
  2. Add gateway configs to your Lepton AI requests
  3. Tracing Lepton AI requests
  4. Setup a fallback from OpenAI to Lepton AI APIs