Vercel AI SDK - LETHE

LETHE’s Chat Completions endpoint is OpenAI-compatible, so it works with the AI SDK’s OpenAI provider by overriding baseURL.

agent.ts

import { createOpenAI } from "@ai-sdk/openai";

const lethe = createOpenAI({
  baseURL: "https://asklethe.ai/v1",
  apiKey: process.env.LETHE_API_KEY,
});

const { text } = await generateText({
  model: lethe("lethe"),
  prompt,
});

Get LETHE_API_KEY from Authentication. Swap "lethe" for "lethe-vision" to send image or video input. See Models.

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